Common side effects include nausea, abdominal pains, and headaches. Potentially serious side effects include bone marrow suppression which usually improves on stopping the medication. Liver inflammation has been reported and those with prior liver problems are at greater risk. It is pregnancy category C in the United States and category D in Australia, meaning it may cause harm if taken by pregnant women. Albendazole is a broad-spectrum antihelminthic agent of the benzimidazole type.
Albendazole came into use in 1971. It is on the World Health Organization’s List of Essential Medicines, the most important medications needed in a basic health system. In many areas of the world, the wholesale cost is between 0.01 and 0.06 USD per dose. In the United States; however, it is very expensive as of 2014 at about 50 USD per dose.