Mebendazole is an antiparasitic medication widely used in humans to treat infections caused by intestinal worms. It belongs to the benzimidazole class of drugs and is effective against a range of parasitic worms, including roundworms, hookworms, whipworms, and pinworms. These infections are common in areas with poor sanitation and can affect people of all ages, especially children. Mebendazole 100mg works by preventing worms from absorbing glucose, which is essential for their survival. As a result, the worms lose energy, become immobilized, and eventually die, allowing the body to eliminate them naturally through the digestive system. The medication primarily acts within the intestines and is minimally absorbed into the bloodstream, which helps reduce systemic side effects.In humans, mebendazole is generally well tolerated when used as prescribed. Common side effects are usually mild and may include stomach pain, diarrhea, nausea, or headache. Serious side effects are rare, especially with short-term use. However, people with liver disease, pregnant women, or those taking the drug for extended periods should use it under medical supervision.