Always talk to your doctor about the risks and benefits of any treatment. Common ones include: Flushing of the skin. A prolonged erection priapism can damage the penis. Priapism can be treated successfully in a hospital, helping you to avoid any lasting damage to the erectile tissue of your penis. Damage to the Optic Nerve Levitra, as well as other ED medications such as Viagra and Cialis, are linked to cases of optic neuropathy, or optic nerve damage. Priapism is a serious medical issue, meaning that if you get an erection that lasts for four hours or longer after using Levitra, you should seek medical assistance immediately.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 . 2 rows · Levitra does have fewer common side effects than Viagra, and it’s not associated with. Common side effects of Levitra include: facial flushing (reddening), headaches, stomach upset, diarrhea, flu-like symptoms, and; nausea. Serious side effects of Levitra include: .