Albendazole 400 mg tablets should be used as directed by your doctor, with or without food, preferably at a consistent time. Ensure you complete the full course of treatment, even if symptoms improve. Avoid doubling up on doses if a dose is missed; instead, take the next dose as scheduled. Common side effects may include headache, dizziness, nausea, and constipation, which are usually temporary. Consult your doctor if side effects persist or worsen. Inform your doctor if you experience persistent diarrhea or blood in stools. Avoid this medication if allergic to any of its components, and use caution in individuals with kidney issues.