Cialis (tadalafil) is the only medication in its class that treats both erectile dysfunction and enlarged prostate symptoms. You can also take it on a regular basis, which can allow for more spontaneity.
Cialis (tadalafil) is a phosphodiesterase-5 enzyme (PDE-5) inhibitor, meaning it blocks PDE-5. This relaxes certain muscles and blood vessels, which increases blood flow to the penis to help with an erection. Cialis (tadalafil) also treats enlarged prostate symptoms.
How long does it take for Cialis (tadalafil) to work?
Cialis (tadalafil) will kick in about 30 minutes after taking it, though it may take longer for some people. On average, it can take up to 2 hours for full effect.
Pros and cons of Cialis (tadalafil)
A first-choice medication for treating erectile dysfunction
Can be taken either as needed, or on a regular basis for those who need it more regularly — this means you can be more spontaneous about the timing of sex.
Lasts longer than Viagra (sildenafil)
Can’t be taken if you’ve had a heart attack in the past 3 months, or a stroke or heart failure in the past 6 months
Can’t be used if you’ve recently taken nitrates like Isordil, Imdur, or nitroglycerin (Nitro-BID, Nitro-Dur, Nitrostat)
Could have more side effects for people who are 65 or older — use this medication with care
Cialis (tadalafil) can be dosed in two ways: (1) taken on a daily basis, or (2) only when you need it. If you’re taking Cialis (tadalafil) on a regular basis, take it at the same time every day.
If you get muscle or back pain with Cialis (tadalafil), it should get better in about 2 days. Talk to your doctor if your symptoms don’t improve.
If you have an erection for more than 4 hours, go to the emergency department (ED) or call your doctor immediately as this can lead to damage to the penis.
Cialis (tadalafil) does not stop the spread of sexually transmitted diseases (STDs) like herpes or HIV. Be sure to practice safe sex.
Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. This page contains specific information for Viagra, not Revatio.
Do not take Viagra while also taking Revatio, unless your doctor tells you to.
Some medicines can cause unwanted or dangerous effects when used with Viagra. Tell your doctor about all your current medicines, especially riociguat (Adempas) and nitrates.
Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as “poppers”. Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.
Stop using Viagra and get emergency medical help if you have sudden vision loss.
You should not use Viagra if you are allergic to sildenafil, or:
Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite (“poppers”). Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
To make sure Viagra is safe for you, tell your doctor if you have ever had:
Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. It is not clear whether sildenafil is the actual cause of vision loss.
Viagra is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
It is not known whether sildenafil passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.
Do not give this medicine to anyone under 18 years old without medical advice.
Take Viagra exactly as it was prescribed for you. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take Viagra more than once per day.
Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor’s instructions.
During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of sildenafil.
Store at room temperature away from moisture and heat.
Since Viagra is used as needed, you are not likely to miss a dose.
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Drinking alcohol with this medicine can cause side effects.
Grapefruit and grapefruit juice may interact with sildenafil and lead to unwanted side effects. Avoid the use of grapefruit products while taking sildenafil.
Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.
Get emergency medical help if you have signs of an allergic reaction to Viagra: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop taking Viagra and get emergency medical help if you have:
Call your doctor at once if you have: