Albendazole 400 mg is a widely used antiparasitic medication prescribed for treating various worm infestations in humans. It belongs to a class of drugs known as benzimidazoles, which work by preventing parasites from absorbing glucose, ultimately causing their death. Doctors commonly recommend Albendazole 400 mg for conditions such as intestinal worms (roundworms, hookworms, whipworms, and pinworms), as well as more serious infections like neurocysticercosis and hydatid disease caused by tapeworm larvae. The medication is usually taken as a single dose for mild infections or over several days or weeks for more complex cases, depending on the type and severity of the infection. It is often advised to take the tablet with food, especially fatty meals, to improve absorption and effectiveness. In some cases, family members may also be treated simultaneously to prevent reinfection. Common side effects may include mild abdominal pain, nausea, headache, or dizziness, while serious side effects are rare but may involve liver function changes or allergic reactions. Therefore, medical supervision is important, especially for prolonged use. Albendazole is generally considered safe and effective when used as prescribed, making it a key medication in controlling parasitic infections worldwide.