What Is Mebex 100 Mg?

Mebex 100 Mg is a chewable anthelmintic (anti-worm) tablet containing Mebendazole 100 mg as its active ingredient. It is manufactured by Cipla Ltd, one of India's most trusted pharmaceutical companies. Mebex belongs to the benzimidazole class of antiparasitic medicines and is included in the WHO's List of Essential Medicines.

Mebex works by starving intestinal worms of glucose — their primary energy source — causing them to become paralyzed and die. The dead worms are then naturally expelled through bowel movements. Because less than 10% of the medicine is absorbed into your bloodstream, it acts mainly inside the gut where the worms live, giving it a favorable safety profile.

Key Facts

What Is Mebex 100 Mg Used For?

Mebex 100 Mg is prescribed for treating single or mixed intestinal worm infections, including:

• Pinworm infection (Enterobiasis) — caused by Enterobius vermicularis, the most common worm infection in children, marked by intense anal itching at night
• Roundworm infection (Ascariasis) — caused by Ascaris lumbricoides, large worms that live in the small intestine and can grow up to 35 cm
• Hookworm infection — caused by Ancylostoma duodenale or Necator americanus, worms that enter through bare feet and feed on blood, often causing anemia
• Whipworm infection (Trichuriasis) — caused by Trichuris trichiura, whip-shaped worms that burrow into the large intestine lining
• Mixed worm infections — when two or more of the above parasites are present simultaneously

How Does Mebex 100 Mg Work?

Mebex works through a two-pronged mechanism that targets worms directly in your gut:

1. Structural collapse — Mebendazole binds to a protein called β-tubulin inside the worm's cells, blocking the formation of microtubules — tiny structural fibers that act as the worm's internal skeleton. Without these, the worm's cells lose their structural integrity.
2. Glucose starvation — Without functional microtubules, the worm can no longer absorb glucose from your intestine. Deprived of its primary energy source, the worm becomes paralyzed, cannot reproduce, and eventually dies.

The dead worms are then passed out naturally through normal bowel movements over the next few days. Importantly, this mechanism targets only the worm's cells — human cells are not affected at the doses used.

How to Take Mebex 100 Mg

• The tablet can be chewed, swallowed whole, or crushed and mixed with food
• Take with water, juice, or milk
• Can be taken with or without food (taking with a light meal reduces stomach upset)
• If taking twice daily, space doses about 12 hours apart (e.g., 8 AM and 8 PM)
• Complete the full course even if you feel better — stopping early may leave worms alive
• A follow-up stool test is recommended 3–4 weeks after treatment to confirm the infection has cleared

Dosage Guide

Children (2 years and above): Same dosage as adults.
Children under 2 years: Consult a pediatrician.
Children under 1 year: Do not use — risk of seizures.

Missed Dose

Take it as soon as you remember. If it is almost time for your next dose, skip the missed one and continue your regular schedule. Never take two doses at once to catch up.

Side Effects

Common (usually go away on their own)

• Stomach pain or cramps — often caused by dying worms, not the medicine itself
• Diarrhea
• Nausea and vomiting
• Loss of appetite
• Gas and bloating
• Headache

Less Common

• Dizziness, skin rash or itching
• Tinnitus (ringing in the ears)
• Mild fever
• Elevated liver enzymes (with prolonged use)
• Hair loss (rare, only with high doses over extended periods)

Seek Immediate Medical Help If You Experience

• Seizures or convulsions
• Swelling of face, lips, or throat (angioedema)
• Difficulty breathing
• Severe skin blistering or peeling
• Unusual bruising or bleeding
• Yellowing of skin or eyes (signs of liver problems)

Important Warnings Before You Take Mebex

• Alcohol: Avoid during treatment — increases stomach irritation and worsens side effects like nausea and dizziness
• Pregnancy: Not recommended in the first trimester (FDA Category C). Use in second/third trimester only if the doctor considers it essential
• Breastfeeding: Small amounts pass into breast milk — consult your doctor before use
• Driving: Generally safe, but avoid driving if you experience dizziness or headache
• Liver disease: Use with caution — Mebendazole is metabolized by the liver. Patients with hepatic disease or biliary obstruction need close monitoring
• Kidney disease: Use with caution — consult your doctor for dose adjustments
• Children under 1 year: Contraindicated due to seizure risk
• Allergy: Do not take if you have ever had an allergic reaction to Mebendazole or any ingredient in the tablet

Drug Interactions — Tell Your Doctor If You Take

• Metronidazole (Flagyl) — can cause life-threatening Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN). Never take together.
• Phenytoin / Fosphenytoin (anti-seizure) — reduces Mebendazole blood levels, potentially making it less effective
• Carbamazepine (anti-seizure) — also reduces Mebendazole blood levels through enzyme induction
• Cimetidine (antacid) — increases Mebendazole levels in blood, raising the risk of side effects

Substitutes for Mebex 100 Mg

These contain the same active ingredient (Mebendazole 100 mg) and may be available as alternatives. Consult your doctor before switching brands.

• Vermox — by Janssen Pharmaceuticals
• Emverm — by Amneal Pharmaceuticals
• Mebenth — by Lupin Ltd
• Sandin — by Cadila Healthcare
• Acavom — by Acacia Pharma
• Zumin — by Zuventus Healthcare

Storage

Store below 30°C in a cool, dry place away from direct sunlight and moisture. Keep in the original packaging until use. Keep out of reach of children and pets. Do not use after the expiry date printed on the pack.

Frequently Asked Questions

Is Mebex an antibiotic?

No. Mebex is an anthelmintic (anti-worm) medicine, not an antibiotic. It works specifically against parasitic worms by starving them of glucose, not against bacteria.

How quickly does Mebex start working?

Mebex begins killing worms within hours of ingestion. However, it may take 1–3 days to completely clear the infection. Dead worms are expelled naturally through bowel movements — you may or may not see them in your stool.

Can I take Mebex on an empty stomach?

Yes, it works with or without food. But taking it with a light meal may reduce the chance of stomach discomfort.

Can Mebex be given to children?

Yes, for children aged 2 years and above — the dosage is the same as for adults. For children between 1–2 years, consult a pediatrician. It should never be given to children under 1 year due to the risk of seizures.

Should I repeat the dose?

For pinworm infections, a second dose after 2 weeks is usually recommended because reinfection is common. For roundworm, hookworm, and whipworm, a follow-up stool test 3–4 weeks after treatment will determine if another course is needed.

Will Mebex kill all types of worms?

Mebex is effective against the most common intestinal worms — pinworms, roundworms, hookworms, and whipworms. It may not be effective against all parasites. Your doctor will determine if Mebex is the right treatment for your specific infection.

Can I take Mebex during pregnancy?

Mebex is not recommended during the first trimester of pregnancy. In the second and third trimesters, it may be used only if your doctor determines the benefit outweighs the risk. If you discover you are pregnant during treatment, stop and inform your doctor immediately.

Does Mebex affect blood sugar in diabetic patients?

No. Mebex blocks glucose uptake only in worms, not in human cells. Diabetic patients can safely use Mebex under medical guidance.

Can I drink milk while taking Mebex?

Yes. There is no interaction between Mebex and milk. The tablet can be swallowed with milk if preferred.

What should I do if the infection comes back?

Reinfection is common, especially with pinworms. Your doctor may prescribe another course. Treating all family members simultaneously and following strict hygiene practices (handwashing, short fingernails, clean bedding) is essential to prevent recurrence.

Disclaimer: This content is for informational purposes only and does not replace professional medical advice. Mebex 100 Mg — consult your healthcare provider before use, especially for children, pregnant women, or patients with liver conditions.