Zhewitra 10 mg contains vardenafil, used to treat erectile dysfunction. Certain foods and drinks can reduce its effectiveness or increase side effects, so it’s best to avoid or limit the following: Foods & drinks to avoid or limit Grapefruit and grapefruit juice Grapefruit can interfere with how vardenafil is processed in the body, which may increase side effects like dizziness, headache, or low blood pressure. High-fat or greasy foods Foods such as fried items, fast food, or very oily meals can delay how quickly the medicine works and may make it less effective. Large or heavy meals before taking it Eating a very large meal just before taking Zhewitra can slow absorption and delay its effect. Alcohol (especially in excess) Too much alcohol can: Increase dizziness or lightheadedness Lower blood pressure Reduce the medicine’s effectiveness If alcohol is consumed, it should be in moderation.