Side Effects and Product Information

Learn more about side-effects, proper usage, and contraindications of prescription erectile dysfunction drugs.

Please select medication to continue:

Levitra by GlaxoSmithKline/Bayer
Viagra by Pfizer
Cialis by Lilly-ICOS

LEVITRA

General Information
LEVITRA (Vardenafil) is a new oral therapy for the treatment of erectile dysfunction. This monohydrochloride salt of Vardenafil is a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5).

What it's For
Erectile dysfunction (ED) is a condition where the penis does not harden and expand when a man is sexually excited, or when he cannot keep an erection. Levitra may help a man with ED get and keep an erection when he is sexually excited.

How it Works
When a man is sexually stimulated, his body‘s normal physical response is to increase blood flow to his penis. This results in an erection. Levitra helps increase blood flow to the penis and may help men with ED get and keep an erection satisfactory for sexual activity. Once a man has completed sexual activity, blood flow to his penis decreases, and his erection goes away.

Dosage Information
Take Levitra as your doctor indicates. Levitra comes in different doses (2.5mg, 5mg, 10mg, and 20mg). For most men, the recommended starting dose is 10mg. Take Levitra no more than once a day. Doses should be taken at least 24 hours apart. Some men can only take a low dose of Levitra because of medical conditions or medicines they take. Take 1 tablet about 1 hour (60 minutes) before sexual activity. This medicine may be taken with or without meals.

Possible Levitra Side Effects
The most common side effects with Levitra are:

 - headache
 - flushing
 - stuffy or runny nose
 - indigestion
 - upset stomach
 - dizziness

These side effects usually go away after a few hours. Talk to your doctor if these side effects persist.

Warnings/Precautions
Do NOT take this medicine with nitrates. Do NOT take with isorbide (medicine used to relieve chest pains). If you have questions about which drugs are nitrates, talk to you pharmacist. Do NOT take this medicine more that once per day. Before taking any new medicine, either prescription or over-the-counter, talk to your doctor or pharmacist.

Overdose Information
Seek medical attention immediately. For non emergencies, contact your local or regional poison control center.

Drug Interactions
Do not take this medicine if you take any medicines called "nitrates." Nitrates are commonly used to treat angina. Do not use recreational drugs called "poppers" like amyl nitrate and butyl nitrate. Do not take medicines called alpha blockers. If Levitra is taken with alpha blockers, your blood pressure could suddenly drop to an unsafe level and you could get dizzy and faint. Do not take Levitra are allergic to Tadalafil. Do not take Levitra if you have been told by your healthcare provider to not have sexual activity because of health problems. Do NOT change your dose of this medicine without talking to your doctor. Do NOT DRINK alcohol to excess when taking this medicine (for example, 5 glasses of wine or 5 shots of whiskey). When taken in excess, alcohol can increase your chances of getting a headache or getting dizzy, increasing your heart rate, or lowering your blood pressure.

Missed Dose Information
Follow dosing instructions. This medicine is used when needed and not taken on a regular basis.

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VIAGRA

How Viagra Works  
VIAGRA (Sildenafil) is used to treat erectile dysfunction. Viagra causes smooth muscle in the penis to relax, increasing blood flow to the penis.

Viagra Dosage Information
Take Viagra 1 hour before sexual activity. The manufacturer mentions an acceptable range of one half hour to four hours that the medicine can be taken before sexual activity.

Possible Viagra Side Effects
 - headache
 - flushing
 - upset stomach, diarrhea
 - changes in vision

Talk to your doctor, if you experience prolonged, painful erections with Viagra.

Viagra Overdose Information
Seek medical attention immediately. For non emergencies, contact your local or regional poison control center.

Viagra Drug Interactions
Nitrates should never be combined with this medicine. Drugs that increase the effects of this medicine include: Cimetidine, Diltiazem, Erythromycin, Itraconazole (Sporanox), Ketoconazole (Nizoral), Metronidazole (Flagyl), Sertraline (Zoloft). The following drugs may decrease the effects of Sildenafil: Carbamazepine (Tegretol), Phenytoin (Dilantin), Rifabutin, and Rifamptin For more information about these interactions talk to your doctor or pharmacist.

Viagra Missed Dose Information
This medicine is used when needed and not taken on a regular basis.

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CIALIS

General Information
CIALIS (Tadalafil), an oral treatment for erectile dysfunction, is a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5).

How it Works
When a man is sexually stimulated, his body‘s normal physical response is to increase blood flow to his penis. This results in an erection. Cialis helps increase blood flow to the penis and may help men with ED get and keep an erection satisfactory for sexual activity. Once a man has completed sexual activity, blood flow to his penis decreases, and his erection goes away. Unlike Viagra and Levitra, one dose of Cialis can remain effective from 12-36 hours!

Dosage Information
Take Cialis exactly as prescribed. For most men the recommended starting dose prescribed is 10-20mg. Cialis should NOT be taken more than once a day. Some men can only take a low dose or this medicine because of medical condtions or medicines that they take.

Possible Cialis Side Effects
The most common side effects with Cialis are:

 - headache
 - flushing
 - stuffy or runny nose
 - indigestion
 - upset stomach
 - dizziness

These side effects usually go away after a few hours. Talk to your doctor if these side effects persist.

Warnings/Precautions
Do not take Cialis if you take any medicines called "nitrates." Nitrates are commonly used to treat angina. Do NOT take with isorbide (medicine used to relieve chest pains). Do not use recreational drugs called "poppers" like amyl nitrate and butyl nitrate. Do not take medicines called alpha blockers. If Cialis is taken with alpha blockers, your blood pressure could suddenly drop to an unsafe level and you could get dizzy and faint. Do not take Cialis are allergic to Tadalafil. Do not take Cialis if you have been told by your healthcare provider to not have sexual activity because of health problems. Do NOT change your dose of this medicine without talking to your doctor. Do NOT DRINK alcohol to excess when taking this medicine (for example, 5 glasses of wine or 5 shots of whiskey). When taken in excess, alcohol can increase your chances of getting a headache or getting dizzy, increasing your heart rate, or lowering your blood pressure.

Overdose Information
Seek medical attention immediately. For non emergencies, contact your local or regional poison control center.

Missed Dose Information
Follow dosing instructions. Cialis is used when needed and not taken on a regular basis.

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