Albendazole 400 mg is a widely used antiparasitic medicine that helps treat various worm infections in humans. It belongs to a group of medicines called anthelmintics, which work by stopping the parasites from absorbing glucose. This causes the parasites to lose energy and eventually die, allowing the body to remove them naturally. Albendazole 400 mg is commonly prescribed to treat infections caused by intestinal worms such as roundworms, hookworms, whipworms, and pinworms. It is also effective against more serious parasitic infections such as those that affect the liver, lungs, and brain. Doctors may recommend it for conditions like hydatid disease and neurocysticercosis, which are caused by tapeworm larvae. The medication is usually taken as a single dose or for a short treatment course depending on the type and severity of the infection. It can be taken with food to improve absorption. In many cases, doctors may advise repeating the dose after a few weeks to ensure that the infection is completely cleared. Common side effects of Albendazole 400 mg may include mild stomach pain, nausea, vomiting, headache, or dizziness. These side effects are usually temporary. However, it is important to take this medicine only under medical supervision, especially for children, pregnant women, or people with liver problems. Overall, Albendazole 400 mg is an effective and commonly used treatment for parasitic worm infections in humans.