This is not a complete list of side effects and others may occur. In research, a typical dose of Levitra produces a drop of 7 mmHg in systolic blood pressure and 8 mmHg in diastolic blood pressure. This is a very uncommon side effect of PDE5 inhibitors. Do not swallow Staxyn with liquid. Inform your healthcare provider about other conditions. This medication is taken with or without food an hour before sex.2 rows · Levitra does have fewer common side effects than Viagra, and it’s not associated with. Common ones include: Flushing of the skin. Headache. Upset stomach. Visual changes, such as blue tinge to vision, sensitivity to light or blurred sight. Stuffy or . What are the side effects of Levitra (Vardenafil)? Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or.