Propofol has been used in association with spinal and epidural anaesthesia and with commonly used premedicants, neuromuscular blocking drugs, inhalational agents and analgesic agents; no pharmacological incompatibility has been encountered. Lower doses of propofol may be required where general anaesthesia or sedation is used as an adjunct to regional anaesthetic techniques.
Profound hypotension has been reported following anaesthetic induction with propofol in patients treated with rifampicin.
Concomitant use of benzodiazepines, parasympatholytic agents or inhalational anaesthetics has been reported to prolong the anaesthesia and to reduce the respiratory rate.
After additional premedication with opioids, the sedative effects of propofol may be intensified and prolonged, and there may be a higher incidence and longer duration of apnoea.
It should be taken into consideration that concomitant use of propofol and medicinal products for premedication, inhalation agents, or analgesic agents may potentiate anaesthesia and cardiovascular side effects.
Concomitant use of central nervous system depressants (e.g. alcohol, general anaesthetics, narcotic analgesics) will result in intensification of their sedative effects. When Fresofol 1% MCT/LCT is combined with centrally depressant drugs administered parenterally, severe respiratory and cardiovascular depression may occur.
After administration of fentanyl, the blood level of propofol may be temporarily increased with an increase in the rate of apnoea.
Bradycardia and cardiac arrest may occur after treatment with suxamethonium or neostigmine.
Leucoencephalopathy has been reported with administration of lipid emulsions such as used for Fresofol 1% MCT/LCT in patients receiving cyclosporine.
A need for lower propofol doses has been observed in patients taking valproate. When used concomitantly, a dose reduction of propofol may be considered.