Zolat

Active Ingredient & Mechanism of Action

• Active Ingredient: Albendazole.
• Mechanism: Albendazole acts as a broad-spectrum anthelmintic by binding to fungal and helminthic $\beta$-tubulin:
  1. Inhibition of Microtubule Synthesis: It inhibits the polymerization of tubulin into microtubules inside the parasite’s intestinal cells.
  2. Energy Depletion: Disruption of microtubules severely impairs glucose uptake and energy storage (glycogen depletion) in the worm, causing paralysis, cellular degeneration, and death.

Dosage Forms & Available Strengths

• Chewable Caplets / Tablets: 400 mg single-dose strength.
• Standard Tablets: 200 mg and 400 mg strengths.
• Oral Suspension: 200 mg / 5 mL (20 mL bottle) liquid formulation, primarily used for young children.

Clinical Indications

• Intestinal Nematodes (Roundworms):
  • Ascaris lumbricoides (large roundworm)
  • Enterobius vermicularis (pinworm/threadworm)
  • Necator americanus / Ancylostoma duodenale (hookworm)
  • Trichuris trichiura (whipworm)
  • Strongyloides stercoralis
• Cestodes (Tapeworms): Taenia species.
• Systemic Tissue Infections (High-Dose / Prolonged Therapy): Neurocysticercosis (pork tapeworm brain infection) and Hydatid disease (Echinococcus infection).

Key Pharmacokinetics

• Absorption: Poorly absorbed from the gastrointestinal tract ($< 5\%$) when taken on an empty stomach, which keeps the active drug in the lumen to target intestinal worms.
• Food Effect: Co-administration with fatty meals increases systemic absorption by up to 5-fold, which is necessary when treating tissue or systemic infections (such as hydatid disease).
• Metabolism & Elimination: Rapidly converted in the liver to its primary active metabolite, albendazole sulfoxide. Excreted mainly via bile into feces, with a minor portion eliminated through urine.

Administration Guidelines

• Intestinal Worms: Often given as a single 400 mg dose (or 200 mg in younger children). In threadworm/pinworm infections, a repeat dose after 2 to 3 weeks is frequently recommended to prevent reinfection.
• Systemic/Tissue Worms: Requires longer continuous daily courses (weeks to months) under direct medical supervision.
• Method: Chewable formulations should be chewed completely or crushed before swallowing. Standard tablets may be swallowed whole with water.

Safety Profile & Considerations

• Common Side Effects: Mild stomach pain, nausea, vomiting, dizziness, headache, and temporary elevation of liver enzymes.
• Pregnancy Warning: Albendazole is teratogenic (can cause fetal harm). It is contraindicated during pregnancy. Women of childbearing age should ensure they are not pregnant before taking Zolat (administration within 7 days of the start of normal menstruation is recommended).
• Precautions & Monitoring:
  • Liver Function: Prolonged high-dose therapy requires periodic monitoring of liver function tests.
  • Bone Marrow Suppression: Extended use can cause bone marrow toxicity (low white blood cells or platelets).
• Key Drug Interactions:
  • Dexamethasone, Cimetidine, & Praziquantel: May increase blood levels of active albendazole sulfoxide.
  • Carbamazepine & Phenobarbital: May induce hepatic enzymes and reduce albendazole plasma levels.

Note: Zolat is a prescription-strength antiparasitic medication. Treatment dosage, duration, and safety screening should be determined under the guidance of a licensed healthcare provider.