Tadarise 10 mg (tadalafil) can cause dizziness in some people, although it is not one of the most common side effects. Dizziness may occur because tadalafil can lower blood pressure slightly by relaxing blood vessels. The risk may be higher if you: Drink large amounts of alcohol. Take medications for high blood pressure. Become dehydrated. Stand up quickly from a sitting or lying position. Take nitrate medications (such as nitroglycerin), which must not be combined with tadalafil because they can cause a dangerous drop in blood pressure. Other common side effects Headache Flushing Indigestion Nasal congestion Back pain Muscle aches What to do if you feel dizzy Sit or lie down until the feeling passes. Rise slowly from sitting or lying positions. Drink enough water unless your doctor has advised you to limit fluids. Avoid driving or operating machinery if you feel lightheaded. Limit alcohol, as it can make dizziness worse. When to seek medical attention Contact a healthcare professional promptly if dizziness is: Severe or persistent. Associated with fainting. Accompanied by chest pain, shortness of breath, or a rapid or irregular heartbeat. If dizziness occurs repeatedly after taking Tadarise 10 mg, your healthcare provider may recommend adjusting your dose, checking for medication interactions, or evaluating other possible causes.