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Levamisole is used to treat worm infections (hook and round worm) and also to treat colon cancer.

How it works

Levamisole belongs to class of medicines called imidazothiazoles. It works by slowing the growth of cancer cells and spread in the body. It also kills the worms by causing paralysis to worm muscles.

Common side effects

Nausea, Rash, Diarrhoea, Feeling of discomfort, Weakness, Dizziness, Bitter taste, Muscle pain, Sore lip, Sore mouth, Chills, Fever


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Expert advice

  • Do not receive live vaccines during treatment with levamisole.
  • Take precautions while using levamisole as it can lower your immunity. Avoid contact with people who have colds, the flu, or other contagious disease and also who have recently been vaccinated with a live vaccine.
  • Do not consume alcohol while taking levamisole as it may worsen the side effects.
  • Seek immediate medical attention if you experience any one of the following serious side effects: difficulty breathing; swelling of the lips, tongue, or face; decreased bone marrow function, extreme fatigue, fever, chills, or signs of infection; confusion or loss of consciousness, memory loss, muscle weakness, numbness or tingling; seizure, speech disturbances).
  • Tell your doctor if you are or planning to become pregnant or are breastfeeding.

Frequently asked questions


Q. Is levamisole illegal/ safe/ a stimulant/ gets you high?
Levamisole is safe if used at prescribed doses for the prescribed duration as advised by your doctor. It is not an illegal or a stimulant drug and it does not make you high.
Q. How does levamisole kill worms?
Levamisole kill the worms by causing paralysis to worm muscles.
Q. What does levamisole taste like?
Levasimole has a metallic taste.

Content on this page was last updated on 03 October, 2016, by Dr. Varun Gupta (MD Pharmacology)