Giardiasis, Amoebiasis, Trichomoniasis
Oral Trichomoniasis; Amoebiasis; Giardiasis Adult: 2 g as a single dose. Severe invasive amoebiasis Adult: 1.5 g daily as single or in divided doses for 5 days.
Oral Trichomoniasis; Amoebiasis; Giardiasis Child: 30 mg/kg as a single dose. Severe invasive amoebiasis Child: 30 mg/kg daily for 5 days.
Hypersensitivity; pregnancy (1st trimester) and lactation.
Secnidazole is active against E histolytica, G lamblia, T vaginalis, Clostridium spp, B fragilis, Gardnerella spp. The drug enters the microorganisms by diffusion and is reduced intracellularly by low oxidation-reduction potential ferredoxin which then result in DNA damage.
Avoid alcohol and disulfiram. Avoid in patients with history of blood disorders.
Nausea, gastralgia, change of taste, metallic taste, stomatitis, urticaria, rashes, leucopenia. Rarely vertigo, moderate neurological, digestive disturbances.
Concurrent disulfiram admin may cause psychotic reactions. Disulfiram-like reactions with alcohol. Cimetidine may prolong half-life. Potentially Fatal: May potentiate anticoagulant effect of warfarin and increase risk of haemorrhage.