Renal and hepatic impairment. CNS diseases e.g. epilepsy or multiple sclerosis. May impair ability to drive or operate machinery. Pregnancy and lactation.
Hypersensitivity to ornidazole or to other nitroimidazole derivatives.
Dose
N/A
Side Effect
Somnolence, headache, nausea, vomiting, dizziness, tremor, rigidity, poor coordination, seizures, tiredness, vertigo, temporary loss of consciousness and signs of sensory or mixed peripheral neuropathy, taste disturbances, abnormal LFTs, skin reactions.
Pregnancy Category
Name :
Not Classified
Description
FDA has not yet classified the drug into a specified pregnancy category.
Mode of Action
Ornidazole is a 5-nitroimidazole derivative active against protozoa and anaerobic bacteria. It is converted to reduction products that interact with DNA to cause destruction of helical DNA structure and strand leading to a protein synthesis inhibition and cell death in susceptible organisms.
Interaction
May decrease absorption of oral fat-soluble vitamins, amiodarone, propafenone. May decrease plasma levels of ciclosporin. May alter the effects of warfarin (monitor INR). May elevate plasma levels of pravastatin.
Pregnancy Category Note
N/A
Adult Dose
Oral
Amoebiasis
Adult: 0.5 g bid for 5-10 days.
Amoebic dysentery
Adult: 1.5 g as a single daily dose for 3 days. Alternatively for patients >60 kg: 1 g bid for 3 days.
Giardiasis
Adult: 1-1.5 g as a single daily dose for 1-2 days.
Trichomoniasis
Adult: 1.5 g as a single daily dose or 0.5 g bid for 5 days. Treat sexual partners concomitantly.
Hepatic impairment: Severe: Double the interval between doses.
Child Dose
Oral
Amoebiasis
Child: 25 mg/kg as a single daily dose for 5-10 days.
Amoebic dysentery
Child: 40 mg/kg daily.
Giardiasis
Child: 30-40 mg/kg daily.
Trichomoniasis
Child: 25 mg/kg as a single dose.
Renal Dose
Renal impairment: Haemodialysis patients: Give a supplemental dose (50% of the usual dose) before dialysis.
Administration
Should be taken with food.
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