Ovex (Mebendazole)

Mebendazole is used to treat helminthic infections by targeting the parasite’s metabolic pathways. It is indicated for:

• Ascariasis: eliminates the adult Ascaris lumbricoides worms, reducing intestinal burden.
• Hookworm disease: eradicates hookworm species, relieving anemia and gastrointestinal symptoms.
• Trichuriasis: removes Trichuris trichiura infections, improving stool consistency and abdominal discomfort.

• Mebendazole interferes with the parasite’s ability to polymerise tubulin, disrupting microtubule formation. This inhibition impairs glucose uptake and leads to depletion of glycogen stores, causing energy loss and eventual death of the helminth.

Mebendazole is generally well tolerated, but adverse reactions can occur.

Common Side Effects

• Abdominal pain: mild to moderate discomfort in the stomach area.
• Nausea: feeling of queasiness often without vomiting.
• Diarrhea: loose, watery stools that may be transient.
• Headache: mild tension‑type headache.
• Rash: mild skin erythema or itching.

Serious or Rare Side Effects

• Hepatotoxicity: elevated liver enzymes indicating liver stress.
• Agranulocytosis: marked reduction in white blood cells, increasing infection risk.
• Severe allergic reaction: hives, swelling, or difficulty breathing.
• Stevens‑Johnson syndrome: rare severe skin blistering.
• Blood dyscrasias: abnormal blood counts requiring monitoring.

When using Mebendazole, consider the following precautions:

• Pregnancy: avoid use during the first trimester unless benefits outweigh risks.
• Breastfeeding: consult a healthcare professional before use.
• Liver function: assess hepatic status in patients with known liver disease.
• Blood counts: monitor complete blood count in prolonged therapy.
• Drug interactions: review concomitant medications for potential interactions.
• Store below 25°C: keep in the original packaging, protect from moisture and direct sunlight.

Mebendazole may interact with several medicines; monitoring is advised.

Major Interactions (Avoid)

• Cytochrome P450 3A4 inhibitors: may increase systemic exposure.
• Cimetidine: can raise plasma levels of mebendazole.

Moderate Interactions (Monitor Closely)

• Antifungal azoles (e.g., ketoconazole): may modestly increase mebendazole concentrations.
• Anticoagulants (e.g., warfarin): potential alteration of INR.
• Antiepileptic drugs (e.g., carbamazepine): may affect metabolism.
• Oral contraceptives: possible reduction in efficacy.
• Vitamin A supplements: theoretical risk of additive toxicity.