Diligan-25 Tablet is used to treat travel sickness (also called motion sickness). It is also used to treat dizziness and sickness caused by inner ear problems (such as vertigo). It contains Meclizine, which blocks the effects of histamine in your brain to reduce symptoms of travel sickness and also helps improve blood flow in the inner ear and reduces symptoms caused by vertigo. It may cause side effects such as sleepiness, dry mouth, blurred vision, headache, and lethargy. Before using this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.