Qubast 20mg Tablet belongs to a group of medicines called antihistamines. It is used in the treatment of various allergic conditions. It relieves symptoms like itching, swelling and rashes. Qubast 20mg Tablet may be taken with or without food. The dose may vary depending on what you are taking it for. Take it as it has been prescribed by your doctor. You may need this medicine only on days you have symptoms, or you may need to take it every day to prevent symptoms from happening. If you stop taking it earlier than advised, your symptoms may come back. This medicine is generally very safe. The most common side effects of this medicine are sleepiness, headache, and dry mouth. These are usually mild and go away after a couple of days as your body gets adjusted to the medicine. Consult your doctor if they persist or worry you. Before taking it, you should tell your doctor if you have any problems with your liver or kidneys or with your heart. Pregnant or breastfeeding women should also consult with their doctor before taking it. Avoid drinking alcohol as it can cause excessive drowsiness with this medicine. It usually does not impair your ability to drive, but you should not drive if it makes you feel sleepy or dizzy.