Mebendazole is a broad-spectrum antiparasitic medication designed to kill various types of intestinal worms in humans. It is widely used due to its effectiveness, safety profile, and minimal side effects. Mebendazole works by preventing the worms from absorbing glucose, their primary energy source. This causes them to lose energy, become paralyzed, and die within a few days. One of the most common Mebendazole uses is for treating pinworm (Enterobius vermicularis) infections, especially in children. Pinworms are small, white, thread-like worms that cause intense anal itching, especially at night. Mebendazole is also effective against roundworms (Ascaris lumbricoides), which can grow quite large and cause abdominal pain, nausea, and intestinal blockages if left untreated. Another parasite targeted by mebendazole is the whipworm (Trichuris trichiura), which can lead to diarrhea, abdominal discomfort, and even anemia in severe cases. Additionally, mebendazole treats hookworm infections (Ancylostoma duodenale and Necator americanus), which are known to cause fatigue, iron-deficiency anemia, and general weakness due to blood loss in the intestines. Though mebendazole is effective against these common intestinal worms, it is not typically used for tapeworms or flukes, which may require other antiparasitic medications like albendazole or praziquantel. Mebendazole is usually taken as a single dose but may be prescribed for several days depending on the type and severity of the worm infection. Always consult a healthcare provider for proper diagnosis and treatment. Keywords: mebendazole, what worms does mebendazole kill, pinworm, roundworm, whipworm, hookworm, intestinal parasites, deworming medicine, antiparasitic treatment.