Mebendazole tablets are an antiparasitic medicine used to treat various intestinal worm infections, such as pinworm (threadworm), roundworm, hookworm, and whipworm; they are usually taken by mouth, either as a single dose or for a few days, depending on the type of worm .What mebendazole is used forMebendazole is mainly prescribed for:Pinworm (threadworm) infection – causes itching around the anus, especially at night .Roundworm (ascariasis) – can cause stomach pain, nausea, and sometimes worms in stool .Hookworm and whipworm – may cause abdominal pain, diarrhea, and anemia in severe cases .Other worm infections like tapeworm (in some cases) and larval stages of certain parasites (e.g., cysticercosis), though higher doses and longer courses are needed .It works by stopping worms from absorbing sugar, which kills them over a few days