Viagra (Sildenafil) belongs to a group of medications called phosphodiesterase type 5 inhibitors. It is used for the treatment of Erectile Dysfunction (male impotence). It helps to achieve and keep an erection sufficient for sexual activity. It does this by allowing a greater blood flow into the penis when a man is sexually aroused. It works only with sexual stimulation and does not incre...More on Viagra indication

Levitra (Vardenafil) belongs to the class of medications called phosphodiesterase type 5 inhibitors. It is used to treat Erectile Dysfunction (male impotence). It helps to achieve penile erection sufficient for sexual activity to occur. It does this by allowing a greater blood flow into the penis when a man taking the medication is sexually aroused. It works only with sexual stimulation and does...More on Levitra indication

Many medications can cause side effects. A side effect is an unwanted response to a medication when it is taken in normal doses. Side effects can be mild or severe, temporary or permanent. The side effects listed below are not experienced by everyone who takes Viagra (Sildenafil). If you are concerned about side effects, discuss the risks and benefits of Viagra (Sildenafil) with your doctor. T...More on Viagra side effects

Many medications can cause side effects. A side effect is an unwanted response to a medication when it is taken in normal doses. Side effects can be mild or severe, temporary or permanent. The side effects listed below are not experienced by everyone who takes Levitra (Vardenafil). If you are concerned about side effects, discuss the risks and benefits of Levitra (Vardenafil) with your doctor. T...More on Levitra side effects

Do not take Viagra (Sildenafil) if you: are allergic to Viagra (Sildenafil) or any ingredients of Viagra (Sildenafil) are taking any type of nitrate medication in any form (oral, sublingual [under the tongue], skin patch, or spray). Nitrate medications include Nitroglycerin and related medications that are used for the relief of chest pain or Angina. They also...More on Viagra contraindications

Do not take Levitra (Vardenafil) if you: are allergic to Levitra (Vardenafil) or any ingredients of Levitra (Vardenafil) are taking (or have taken in the past 24 hours) any medication that contains nitrates (e.g., amyl nitrite "poppers," isosorbide mononitrate, isosorbide dinitrate, Nitroglycerin, nitric oxide) are taking Cobicistat, atazanavir, indinavir, ritonavir, or saquinavir (f...More on Levitra contraindications

There may be an interaction between Viagra (Sildenafil) and any of the following: Abiraterone alcohol alpha agonists (e.g., Clonidine, methyldopa) alpha-blockers (e.g., doxazosin, Terazosin) Alprostadil Amiodarone angiotensin converting enzyme inhibitors (ACEIs; e.g., Captopril, Enalapril, Ramipril)...More on Viagra precautions

There may be an interaction between Levitra (Vardenafil) and any of the following: alcohol Aldesleukin Aliskiren alpha-agonists (e.g., Clonidine, methyldopa) alpha-blockers (e.g., Alfuzosin, doxazosin, Terazosin) Alprostadil Amiodarone angiotensin converting enzyme inhibitors (ACEIs; Captopril, Ramipril) angiotensin receptor blockers (ARBs; e.g., Candesartan, Irbe...More on Levitra precautions