Itrazole

Itraconazole (Itrazole) 100 mg is a size '0' hard gelatin capsule with blue opaque cap and pink transparent body, imprinted as '100' on the body and '1463' on the cap with black ink, containing white to off white pellets.
Each hard gelatin capsule contains: Itraconazole 100 mg.

Pharmacology: Pharmacodynamics: Itraconazole, a triazole derivative, has a broad spectrum of activity.
In vitro studies have demonstrated that Itraconazole impairs the synthesis of ergosterol in fungal cells. Ergosterol is a vital cell membrane component in fungi. Impairment of its synthesis ultimately results in an antifungal effect.
For Itraconazole, breakpoints have only been established for Candida spp. from superficial mycotic infections (CLSI M27-A2, breakpoints have not been established for EUCAST methodology). The CLSI breakpoints are as follows: susceptible ≤0.125; susceptible, dose dependent 0.25-0.5 and resistant ≥1 μg/mL. Interpretive breakpoints have not been established for the filamentous fungi.
In vitro studies demonstrate that Itraconazole inhibits the growth of a broad range of fungi pathogenic for humans at concentrations usually ≤1 μg/mL. These include: dermatophytes (Trichophyton spp., Microsporum spp., Epidermophyton floccosum); yeasts (Candida spp., including C. albicans, C. tropicalis, C. parapsilosis and C. krusei, Cryptococcus neoformans, Malassezia spp., Trichosporon spp., Geotrichum spp.); Aspergillus spp.; Histoplasma spp., including H. capsulatum; Paracoccidioides brasiliensis; Sporothrix schenckii; Fonsecaea spp.; Cladosporium spp.; Blastomyces dermatitidis; Coccidiodes immitis; Pseudallescheria boydii; Penicillium marneffei; and various other yeasts and fungi.
Candida krusei, Candida glabrata and Candida tropicalis are generally the least susceptible Candida species, with some isolates showing unequivocal resistance to Itraconazole in vitro.
The principal fungus types that are not inhibited by Itraconazole are Zygomycetes (e.g. Rhizopus spp., Rhizomucor spp., Mucor spp. and Absidia spp.), Fusarium spp., Scedosporium proliferans and Scopulariopsis spp.
Azole resistance appears to develop slowly and is often the result of several genetic mutations. Mechanisms that have been described are overexpression of ERG11, which encodes the target enzyme 14α-demethylase, point mutations in ERG11 that lead to decreased target affinity and/or transporter over expression resulting in increased efflux. Cross resistance between members of the azole class has been observed within Candida spp., although resistance to one member of the class does not necessarily confer resistance to other azoles. Itraconazole resistant strains of Aspergillus fumigatus have been reported.
Pharmacokinetics: General pharmacokinetic characteristics: Peak plasma concentrations of Itraconazole are reached within 2 to 5 hours following oral administration. As a consequence of non-linear pharmacokinetics, Itraconazole accumulates in plasma during multiple dosing. Steady-state concentrations are generally reached within about 15 days, with C_max values of 0.5 μg/mL, 1.1 μg/mL and 2.0 μg/mL after oral administration of 100 mg once daily, 200 mg once daily and 200 mg b.i.d., respectively. The terminal half-life of Itraconazole generally ranges from 16 to 28 hours after single dose and increases to 34 to 42 hours with repeated dosing. Once treatment is stopped, Itraconazole plasma concentrations decrease to an almost undetectable concentration within 7 to 14 days, depending on the dose and duration of treatment. Itraconazole mean total plasma clearance following intravenous administration is 278 mL/min. Itraconazole clearance decreases at higher doses due to saturable hepatic metabolism.
Absorption: Itraconazole is rapidly absorbed after oral administration. Peak plasma concentrations of the unchanged drug are reached within 2 to 5 hours following an oral capsule dose. The observed absolute bioavailability of Itraconazole is about 55%. Oral bioavailability is maximal when the capsules are taken immediately after a full meal.
Absorption of Itraconazole capsules is reduced in subjects with reduced gastric acidity, such as subjects taking medications known as gastric acid secretion suppressors (e.g., H2-receptor antagonists, proton pump inhibitors) or subjects with achlorhydria caused by certain diseases Absorption of Itraconazole under fasted conditions in these subjects is increased when Itraconazole Capsules are administered with an acidic beverage (such as a non-diet cola). When Itraconazole Capsules were administered as a single 200 mg dose under fasted conditions with non-diet cola after ranitidine pretreatment, a H2-receptor antagonist, Itraconazole absorption was comparable to that observed when Itraconazole Capsules were administered alone.
Itraconazole exposure is lower with the capsule formulation than with the oral solution when the same dose of drug is given.
Distribution: Most of the Itraconazole in plasma is bound to protein (99.8%) with albumin being the main binding component (99.6% for the hydroxymetabolite). It has also a marked affinity for lipids. Only 0.2% of the Itraconazole in plasma is present as free drug. Itraconazole is distributed in a large apparent volume in the body (>700 L), suggesting its extensive distribution into tissues: Concentrations in lung, kidney, liver, bone, stomach, spleen and muscle were found to be two to three times higher than corresponding concentrations in plasma, and the uptake into keratinous tissues, skin in particular, is up to four times higher than in plasma. Concentrations in the cerebrospinal fluid are much lower than in plasma, but efficacy has been demonstrated against infections present in the cerebrospinal fluid.
Metabolism: Itraconazole is extensively metabolised by the liver into a large number of metabolites. In vitro studies have shown that CYP3A4 is the major enzyme involved in the metabolism of Itraconazole. The main metabolite is hydroxy-Itraconazole, which has in vitro antifungal activity comparable to Itraconazole; trough plasma concentrations of the hydroxy-Itraconazole are about twice those of Itraconazole.
Excretion: Itraconazole is excreted mainly as inactive metabolites in urine (35%) and feces (54%) within one week of an oral solution dose. Renal excretion of Itraconazole and the active metabolite hydroxy-Itraconazole account for less than 1% of an intravenous dose. Based on an oral radiolabeled dose, faucal excretion of unchanged drug varies between 3 to 18% of the dose.
Special Populations: Hepatic Impairment: Itraconazole is predominantly metabolized in the liver. A pharmacokinetic study using a single 100 mg dose of Itraconazole (one 100 mg capsule) was conducted in 6 healthy and 12 cirrhotic subjects. A statistically significant reduction in average C_max (47%) and a two-fold increase in the elimination half-life (37±17 versus 16±5 hours) of Itraconazole were noted in cirrhotic subjects compared with healthy subjects. However, overall exposure to Itraconazole, based on AUC, was similar in cirrhotic patients and in healthy subjects. Data are not available in cirrhotic patients during long-term use of Itraconazole.
Renal Impairment: Limited data are available on the use of oral Itraconazole in patients with renal impairment. A pharmacokinetic study using a single 200 mg dose of Itraconazole (four 50 mg capsules) was conducted in three groups of patients with renal impairment (uremia: n=7; hemodialysis: n=7; and continuous ambulatory peritoneal dialysis: n=5). In uremic subjects with a mean creatinine clearance of 13 mL/min × 1.73 m², the exposure, based on AUC, was slightly reduced compared with normal population parameters. This study did not demonstrate any significant effect of hemodialysis or continuous ambulatory peritoneal dialysis on the pharmacokinetics of Itraconazole (T_max, C_max, and AUC_0-8h). Plasma concentration-versus-time profiles showed wide inter-subject variation in all three groups.
After a single intravenous dose, the mean terminal half-lives of Itraconazole in patients with mild (defined in this study as CrCl 50 to 79 mL/min), moderate (defined in this study as CrCl 20-49 mL/min), and severe renal impairment (defined in this study as CrCl <20 mL/min) were similar to that in healthy subjects, (range of means 42 to 49 hours vs 48 hours in renally impaired patients and healthy subjects, respectively.) Overall exposure to Itraconazole, based on AUC, was decreased in patients with moderate and severe renal impairment by approximately 30% and 40%, respectively, as compared with subjects with normal renal function. Data are not available in renally impaired patients during long-term use of Itraconazole. Dialysis has no effect on the half-life or clearance of Itraconazole or hydroxy-Itraconazole.
Pediatrics: Limited pharmacokinetic data are available on the use of Itraconazole in the paediatric population. Clinical pharmacokinetic studies in children and adolescents aged between 5 months and 17 years were performed with Itraconazole capsules, oral solution or intravenous formulation. Individual doses with the capsule and oral solution formulation ranged from 1.5 to 12.5 mg/kg/day, given as once-daily or twice-daily administration. The intravenous formulation was given either as a 2.5 mg/kg single infusion, or a 2.5 mg/kg infusion given once daily or twice daily. For the same daily dose, twice daily dosing compared to single daily dosing yielded peak and trough concentrations comparable to adult single daily dosing. No significant age dependence was observed for Itraconazole AUC and total body clearance, while weak associations between age and Itraconazole distribution volume, C_max and terminal elimination rate were noted. Itraconazole apparent clearance and distribution volume seemed to be related to weight.

Itraconazole is indicated for the following: Vulvovaginal Candidosis.
Pityriasis Versicolor.
Dermatophytoses caused by organisms susceptible to Itraconazole (Trichophyton spp., Microsporum spp., Epidermophyton floccosum) e.g. tinea pedis, tinea cruris, tinea corporis, tinea manuum.
Oropharyngeal candidosis.
Onychomycosis caused by dermatophytes and/or yeasts.
Treatment of histoplasmosis.
Indicated in the following systemic fungal conditions when first-line systemic anti-fungal therapy is inappropriate or has proved ineffective. This may be due to underlying pathology, insensitivity of the pathogen or drug toxicity.
Treatment of aspergillosis and candidosis.
Treatment of cryptococcosis (including cryptococcal meningitis): in immunocompromised patients with cryptococcosis and in all patients with cryptococcosis of the central nervous system.
Maintenance therapy in AIDS patients to prevent relapse of underlying fungal infection.
Indicated in the prevention of fungal infection during prolonged neutropenia when standard therapy is considered inappropriate.

Itraconazole is for oral administration and must be taken immediately after a meal for maximal absorption. The capsules must be swallowed whole.
Treatment schedules in adults for each indication are as follows: See Table 1.

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For skin, vulvovaginal and oropharyngeal infections, optimal clinical and mycological effects are reached 1 to 4 weeks after cessation of treatment and for nail infections, 6 to 9 months after the cessation of treatment. This is because elimination of Itraconazole from skin, nails and mucous membranes is slower than from plasma.
The length of treatment for systemic fungal infections should be dictated by the mycological and clinical response to therapy: See Table 2.

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Impaired absorption in AIDS and neutropenic patients may lead to low Itraconazole blood levels and lack of efficacy. In such cases, blood level monitoring and if necessary, an increase in Itraconazole dose to 200 mg twice daily, is indicated.
Special populations: Paediatrics: Clinical data on the use of Itraconazole Capsules in paediatric patients are limited. The use of Itraconazole capsules in paediatric patients is not recommended unless it is determined that the potential benefit outweighs the potential risks.
Elderly: Clinical data on the use of Itraconazole Capsules in elderly patients are limited. It is advised to use Itraconazole capsules in these patients only if it is determined that the potential benefit outweighs the potential risks. In general, it is recommended that the dose selection for an elderly patient should be taken into consideration, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.
Renal impairment: Limited data are available on the use of oral Itraconazole in patients with renal impairment. The exposure of Itraconazole may be lower in some patients with renal insufficiency. Caution should be exercised when this drug is administered in this patient population and adjusting the dose may be considered.
Hepatic impairment: Limited data are available on the use of oral Itraconazole in patients with hepatic impairment. Caution should be exercised when this drug is administered in this patient population.

In general, adverse events reported with overdose have been consistent with those reported for Itraconazole use.
In the event of overdosage, supportive measures should be employed. Activated charcoal may be given if considered appropriate. Itraconazole cannot be removed by hemodialysis. No specific antidote is available.

Itraconazole Capsules are contraindicated in patients with known hypersensitivity to Itraconazole or to any of the excipients.
Co-administration of a number of CYP3A4 substrates is contraindicated with Itraconazole Capsules. Increased plasma concentrations of these drugs, caused by co-administration with Itraconazole, may increase or prolong both therapeutic and adverse effects to such an extent that a potentially serious situation may occur. For example, increased plasma concentrations of some of these drugs can lead to QT prolongation and ventricular tachyarrhythmias including occurrences of torsade de pointes, a potentially fatal arrhythmia.
Itraconazole Capsules should not be administered to patients with evidence of ventricular dysfunction such as congestive heart failure (CHF) or a history of CHF except for the treatment of life-threatening or other serious infections.
Itraconazole Capsules must not be used during pregnancy except for life-threatening cases. Women of childbearing potential taking Itraconazole Capsules should use contraceptive precautions. Effective contraception should be continued until the menstrual period following the end of Itraconazole Capsules therapy.

Cross-hypersensitivity: There is no information regarding cross hypersensitivity between Itraconazole and other azole antifungal agents. Caution should be used in prescribing Itraconazole Capsules to patients with hypersensitivity to other azoles.
Cardiac effects: Itraconazole has been shown to have a negative inotropic effect and Itraconazole Capsules has been associated with reports of congestive heart failure. Heart failure was more frequently reported among spontaneous reports of 400 mg total daily dose than among those of lower total daily doses, suggesting that the risk of heart failure might increase with the total daily dose of Itraconazole.
Itraconazole should not be used in patients with congestive heart failure or with a history of congestive heart failure unless the benefit clearly outweighs the risk. This individual benefit/risk assessment should take into consideration factors such as the severity of the indication, the dosing regimen (e.g. total daily dose), and individual risk factors for congestive heart failure. These risk factors include cardiac disease, such as ischemic and valvular disease; significant pulmonary disease, such as chronic obstructive pulmonary disease; and renal failure and other oedematous disorders. Such patients should be informed of the signs and symptoms of congestive heart failure, should be treated with caution, and should be monitored for signs and symptoms of congestive heart failure during treatment; if such signs or symptoms do occur during treatment, Itraconazole should be discontinued.
Calcium channel blockers can have negative inotropic effects which may be additive to those of Itraconazole. In addition, Itraconazole can inhibit the metabolism of calcium channel blockers. Therefore, caution should be exercised when co-administering Itraconazole and calcium channel blockers due to an increased risk of congestive heart failure.
Hepatic effects: Very rare cases of serious hepatotoxicity, including some cases of fatal acute liver failure, have occurred with the use of Itraconazole Capsules. Most of these cases involved patients who, had pre-existing liver disease, were treated for systemic indications, had significant other medical conditions and/or were taking other hepatotoxic drugs. Some patients had no obvious risk factors for liver disease. Some of these cases were observed within the first month of treatment, including some within the first week. Liver function monitoring should be considered in patients receiving Itraconazole Capsules treatment. Patients should be instructed to promptly report to their physician signs and symptoms suggestive of hepatitis such as anorexia, nausea, vomiting, fatigue, abdominal pain or dark urine. In these patients, treatment should be stopped immediately and liver function testing should be conducted.
Limited data are available on the use of oral Itraconazole in patients with hepatic impairment. Caution should be exercised when the drug is administered in this patient population. It is recommended that patients with impaired hepatic function be carefully monitored when taking Itraconazole. It is recommended that the prolonged elimination half-life of Itraconazole observed in the single oral dose clinical trial with Itraconazole capsules in cirrhotic patients be considered when deciding to initiate therapy with other medications metabolized by CYP3A4.
In patients with elevated or abnormal liver enzymes or active liver disease, or who have experienced liver toxicity with other drugs, treatment with Itraconazole is strongly discouraged unless there is a serious or life-threatening situation where the expected benefit exceeds the risk. It is recommended that liver function monitoring be done in patients with pre-existing hepatic function abnormalities or those who have experienced liver toxicity with other medications.
Reduced Gastric Acidity: Absorption of Itraconazole from Itraconazole Capsules is impaired when gastric acidity is reduced. In patients with reduced gastric acidity, whether from disease (e.g. patients with achlorhydria) or from concomitant medication (e.g. patients taking drugs that reduce gastric acidity), it is advisable to administer Itraconazole Capsules with an acidic beverage (such as non-diet cola). The antifungal activity should be monitored and the Itraconazole dose increased as deemed necessary.
Hearing Loss: Transient or permanent hearing loss has been reported in patients receiving treatment with Itraconazole. Several of these reports included concurrent administration of quinidine which is contraindicated. The hearing loss usually resolves when treatment is stopped, but can persist in some patients.
Immunocompromised patients: In some immunocompromised patients (e.g., neutropenic, AIDS or organ transplant patients), the oral bioavailability of Itraconazole Capsules may be decreased.
Patients with immediately life-threatening systemic fungal infections: Due to the pharmacokinetic properties, Itraconazole Capsules are not recommended for initiation of treatment in patients with immediately life-threatening systemic fungal infections.
Patients with AIDS: In patients with AIDS having received treatment for a systemic fungal infection such as sporotrichosis, blastomycosis, histoplasmosis or cryptococcosis (meningeal or non-meningeal) and who are considered at risk for relapse, the treating physician should evaluate the need for a maintenance treatment.
Neuropathy: If neuropathy occurs which may be attributable to Itraconazole Capsules, the treatment should be discontinued.
Cross-resistance: In systemic candidosis, if fluconazole-resistant strains of Candida species are suspected, it cannot be assumed that these are sensitive to Itraconazole, hence their sensitivity should be tested before the start of Itraconazole therapy.
Interchangeability: It is not recommended that Itraconazole Capsules and Itraconazole Oral Solution be used interchangeably. This is because drug exposure is greater with the oral solution than with the capsules when the same dose of drug is given.
Interaction Potential: Co-administration of specific drugs with Itraconazole may result in changes in efficacy of Itraconazole and/or the co-administered drug, life-threatening effects and/or sudden death.
Drugs that are contraindicated, not recommended or recommended for use with caution in combination with Itraconazole.
Renal Impairment: Limited data are available on the use of oral Itraconazole in patients with renal impairment. The exposure of Itraconazole may be lower in some patients with renal insufficiency. Caution should be exercised when this drug is administered in this patient population and adjusting the dose may be considered.
Use in Children: Clinical data on the use of Itraconazole Capsules in pediatric patients is limited. The use of Itraconazole Capsules in pediatric patients is not recommended unless it is determined that the potential benefit outweighs the potential risks.
Use in the Elderly: Clinical data on the use of Itraconazole Capsules in elderly patients are limited. It is advised to use Itraconazole Capsules in these patients only if it is determined that the potential benefit outweighs the potential risks. In general, it is recommended that the dose selection for an elderly patient should be taken into consideration, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

Pregnancy: Itraconazole Capsules must not be used during pregnancy except for life-threatening cases where the potential benefit to the mother outweighs the potential harm to the fetus. In animal studies Itraconazole has shown reproduction toxicity. There is limited information on the use of Itraconazole during pregnancy. During post-marketing experience, cases of congenital abnormalities have been reported. These cases included skeletal, genitourinary tract, cardiovascular and ophthalmic malformations as well as chromosomal and multiple malformations. A causal relationship with Itraconazole has not been established.
Epidemiological data on exposure to Itraconazole during the first trimester of pregnancy mostly in patients receiving short-term treatment for vulvovaginal candidosis did not show an increased risk for malformations as compared to control subjects not exposed to any known teratogens.
Lactation: A very small amount of Itraconazole is excreted in human milk. The expected benefits of Itraconazole therapy should be weighed against the risks of breast feeding. In case of doubt, the patient should not breast feed.

Summary of the safety profile: The most frequently reported adverse drug reactions (ADRs) with ITRACONAZOLE Capsules treatment identified from clinical trials and/or from spontaneous reporting were headache, abdominal pain, and nausea. The most serious ADRs were serious allergic reactions, cardiac failure/congestive heart failure/pulmonary oedema, pancreatitis, serious hepatotoxicity (including some cases of fatal acute liver failure), and serious skin reactions. Refer to subsection Tabulated list of adverse reactions for the frequencies and for other observed ADRs.
Tabulated list of adverse reactions: The ADRs in the table as follows were derived from open-label and double-blind clinical trials with Itraconazole Capsules involving 8499 patients in the treatment of dermatomycoses or onychomycosis, and from spontaneous reporting.
The table as follows presents ADRs by System Organ Class. Within each System Organ Class, the ADRs are presented by incidence, using the following convention: Very common (≥1/10); Common (≥1/100 to <1/10); Uncommon (≥1/1,000 to <1/100); Rare (≥1/10,000 to <1/1,000); Very rare (<1/10,000). (See Table 3.)

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Pediatric population: The safety of Itraconazole Capsules was evaluated in 165 pediatric patients aged 1 to 17 years who participated in 14 clinical trials (4 double-blind, placebo controlled trials; 9 open-label trials; and 1 trial had an open-label phase followed by a double-blind phase). These patients received at least one dose of Itraconazole Capsules for the treatment of fungal infections and provided safety data.
Based on pooled safety data from these clinical trials, the commonly reported adverse drug reactions (ADRs) in pediatric patients were Headache (3.0%), Vomiting (3.0%), Abdominal pain (2.4%), Diarrhoea (2.4%), Hepatic function abnormal (1.2%), Hypotension (1.2%), Nausea (1.2%), and Urticaria (1.2%). In general, the nature of ADRs in pediatric patients is similar to that observed in adult subjects, but the incidence is higher in the pediatric patients.
ADR Reporting Statement: Patient to seek medical attention immediately at the first sign of any adverse reaction.

Itraconazole is mainly metabolized through CYP3A4. Other substances that either share this metabolic pathway or modify CYP3A4 activity may influence the pharmacokinetics of Itraconazole. Similarly, Itraconazole may modify the pharmacokinetics of other substances that share this metabolic pathway. Itraconazole is a potent CYP3A4 inhibitor and a P-glycoprotein inhibitor. When using concomitant medication, it is recommended that the corresponding label be consulted for information on the route of metabolism and the possible need to adjust dosages.
Drugs that may decrease Itraconazole plasma concentrations: Drugs that reduce the gastric acidity (e.g. acid neutralizing medicines such as aluminum hydroxide, or acid secretion suppressors such as H2-receptor antagonists and proton pump inhibitors) impair the absorption of Itraconazole from Itraconazole capsules. It is recommended that these drugs be used with caution when co-administered with Itraconazole capsules: It is recommended that Itraconazole be administered with an acidic beverage (such as non-diet cola) upon co-treatment with drugs reducing gastric acidity.
It is recommended that acid neutralizing medicines (e.g. aluminum hydroxide) be administered at least 1 hour before or 2 hours after the intake of Itraconazole Capsules.
Upon co-administration, it is recommended that the antifungal activity be monitored and the Itraconazole dose increased as deemed necessary.
Co-administration of Itraconazole with potent enzyme inducers of CYP3A4 may decrease the bioavailability of Itraconazole and hydroxy-Itraconazole to such an extent that efficacy may be largely reduced.
Examples include: Antibacterials: isoniazid, rifabutin (see also under Drugs that may have their plasma concentrations increased by Itraconazole), rifampicin.
Anticonvulsants: carbamazepine, (see also under Drugs that may have their plasma concentrations increased by Itraconazole), phenobarbital, phenytoin.
Antivirals: efavirenz, nevirapine.
Therefore, administration of potent enzyme inducers of CYP3A4 with Itraconazole is not recommended. It is recommended that the use of these drugs be avoided from 2 weeks before and during treatment with Itraconazole, unless the benefits outweigh the risk of potentially reduced Itraconazole efficacy. Upon co-administration, it is recommended that the antifungal activity be monitored and the Itraconazole dose increased as deemed necessary.
Drugs that may increase Itraconazole plasma concentrations: Potent inhibitors of CYP3A4 may increase the bioavailability of Itraconazole.
Examples include: Antibacterials: ciprofloxacin, clarithromycin, erythromycin.
Antivirals: ritonavir-boosted darunavir, ritonavir-boosted fosamprenavir, indinavir (see also under Drugs that may have their plasma concentrations increased by Itraconazole), ritonavir (see also under Drugs that may have their plasma concentrations increased by Itraconazole).
It is recommended that these drugs be used with caution when co-administered with Itraconazole capsules. It is recommended that patients who must take Itraconazole concomitantly with potent inhibitors of CYP3A4 be monitored closely for signs or symptoms of increased or prolonged pharmacologic effects of Itraconazole, and the Itraconazole dose be decreased as deemed necessary. When appropriate, it is recommended that Itraconazole plasma concentrations be measured.
Drugs that may have their plasma concentrations increased by Itraconazole: Itraconazole and its major metabolite, hydroxy-Itraconazole, can inhibit the metabolism of drugs metabolized by CYP3A4 and can inhibit the drug transport by P-glycoprotein, which may result in increased plasma concentrations of these drugs and/or their active metabolite(s) when they are administered with Itraconazole. These elevated plasma concentrations may increase or prolong both therapeutic and adverse effects of these drugs. CYP3A4-metabolised drugs known to prolong the QT interval may be contraindicated with Itraconazole, since the combination may lead to ventricular tachyarrhythmias including occurrences of torsade de pointes, a potentially fatal arrhythmia. Once treatment is stopped, Itraconazole plasma concentrations decrease to an almost undetectable concentration within 7 to 14 days, depending on the dose and duration of treatment. In patients with hepatic cirrhosis or in subjects receiving CYP3A4 inhibitors, the decline in plasma concentrations may be even more gradual. This is particularly important when initiating therapy with drugs whose metabolism is affected by Itraconazole.
The interacting drugs are categorized as follows: 'Contraindicated': Under no circumstances is the drug to be co-administered with Itraconazole, and up to two weeks after discontinuation of treatment with Itraconazole.
'Not recommended': It is recommended that the use of the drug be avoided during and up to two weeks after discontinuation of treatment with Itraconazole, unless the benefits outweigh the potentially increased risks of side effects. If co-administration cannot be avoided, clinical monitoring for signs or symptoms of increased or prolonged effects or side effects of the interacting drug is recommended, and its dosage be reduced or interrupted as deemed necessary. When appropriate, it is recommended that plasma concentrations be measured.
'Use with caution': Careful monitoring is recommended when the drug is co-administered with Itraconazole. Upon co-administration, it is recommended that patients be monitored closely for signs or symptoms of increased or prolonged effects or side effects of the interacting drug, and its dosage be reduced as deemed necessary. When appropriate, it is recommended that plasma concentrations be measured.
Examples of drugs that may have their plasma concentrations increased by Itraconazole presented by drug class with advice regarding co-administration with Itraconazole: See Table 4.

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Drugs that may have their plasma concentrations decreased by Itraconazole: Co-administration of Itraconazole with the NSAID meloxicam may decrease the plasma concentrations of meloxicam. It is recommended that meloxicam be used with caution when co-administered with Itraconazole, and its effects or side effects be monitored. It is recommended that the dosage of meloxicam, if co-administered with Itraconazole, be adapted if necessary.
Pediatric Population: Interaction studies have only been performed in adults.

Store at temperatures not exceeding 30°C.

Antifungals

J02AC02 - itraconazole ; Belongs to the class of triazole and tetrazole derivatives. Used in the systemic treatment of mycotic infections.

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