Side effects and hazards of headache, flushing, indigestion, dizziness, and nausea may occur with the use of vardenafil, and symptoms can range from mild to moderate. If you need to use this medication, you need to use it under the supervision of your doctor. Vardenafil is mainly used to treat erectile dysfunction of the penis in men. Transient or mild to moderate adverse reactions such as headache, flushing, dyspepsia, vertigo, and nausea may occur with the use of vardenafil. Patients with cardiovascular disease should only use this medication under the supervision of a doctor before engaging in sexual intercourse. The drug should be used with caution in patients with anatomical deformities of the penis or erections that do not subside. Avoid concomitant use of vardenafil in patients taking nitrate or nitrous oxide donor therapy and treatment with indinavir, ritonavir, and vardenafil. If you need to use this medication, use it under the supervision of a doctor.