Tablet and 120 mg/5 mL Syrup: Paracetamol, when taken within the recommended dose and duration of treatment, has low incidence of side effects.
Skin rashes, hypersensitivity reactions, changes in the number of white blood cells and platelets, and minor stomach and intestinal disturbances have been reported.
250 mg/5 mL Syrup: When taken in recommended dose, paracetamol is usually free from side effects. Skin reactions, e.g., urticaria have been described rarely. Overdosage with paracetamol can result in severe liver damage and sometimes acute renal tubular necrosis. Prompt treatment with acetylcysteine or methionine is essential.
Rectal Suppository: Paracetamol, when used within the recommended dose and duration of treatment, has low incidence of side effects. The most common side effects associated with the use of paracetamol suppositories are redness of the rectal mucous membranes.
Blood and lymphatic system disorders: Anemia (decreased number of healthy red blood cells), changes in the number of white blood cells and platelets such as agranulocytosis (decrease in the number of granulocytes), leukopenia (decrease in the number of leukocytes), methemoglobinemia (presence of methemoglobin in the blood), neutropenia (decrease in the number of neutrophils), pancytopenia (deficiency of all cellular elements in the blood), thrombocytopenia (decrease in the number of platelets); thrombocytopenic purpura (small purple-red marks in the skin or other tissue caused by low number of platelets).
Immune system disorders: Allergic reactions, hives, angioedema (swelling of face, tongue, lips, or throat), proneness to infections, swelling around the eyes.
Metabolism and nutrition disorders: Hyperchloremia (increased chlorine ion in the blood), hyperuricemia (increased uric acid in the blood).
Vascular disorders: Petechiae (pinpoint red spots on skin), unusual bleeding or bruising.
Respiratory, thoracic, and mediastinal disorders: Laryngeal edema (swelling of the voice box), respiratory distress (noisy, congested breathing), sore throat, throat ulcer.
Gastrointestinal disorders: Hematochezia (blood in stools), melena (black, tarry stools), mouth ulcers.
Skin and subcutaneous tissue disorder: Itching, serious skin reactions such as Stevens-Johnson syndrome, toxic epidermal necrolysis, and acute generalized exanthematous pustulosis; skin rash.
Hepatobiliary disorders: Chronic hepatic necrosis (death of liver tissues) in prolonged use, liver injury, liver toxicity.
Renal and urinary disorders: Hematuria (blood in urine), renal colic (severe and/or sharp pain in the lower back and or side with prolonged use of high doses in patients with severe renal function impairment), renal failure, sterile pyuria (cloudy urine), uremia (high levels of urea in the urine).
General disorders and administration site conditions: Fever.
Investigations: Decreases in serum bicarbonate, serum calcium, serum sodium; increases in creatinine levels, lactate dehydrogenase activity, prothrombin levels, serum alkaline phosphatase, serum bilirubin, serum glucose, serum transaminase.