Cialis is the brand name for the drug Tadalafil. Tadalafil is a type of medication used to treat erectile dysfunction, a condition where men find it difficult to get or maintain an erection.

Cialis works by increasing blood flow to the penis so you can get and keep an erection.

The difference between Cialis and Viagra and other ED medications is that it tends to be longer lasting. While Viagra works for three to five hours, a typical dose of Cialis keeps working for 24 to 36 hours in your body.

Cialis tablets come in different strengths such as 10mg and 20mg. The tablets can be taken with or without food. Cialis dosing should not be repeated within 72 hours.

Cialis is also available in a smaller daily dose (2.5 or 5mg) for people that have sex frequently and prefer not to worry about dosing on-demand.

Usually, Cialis will start to work within 30 to 60 minutes, so take it at least a half hour before you plan to have sex.

Common Cialis side effects include flushing, lightheadedness, headache, runny nose, or nausea.

If you develop an erection that lasts longer than 3 hours please go to the emergency department - this is a rare but dangerous side effect called priapism.

There have been exceedingly rare reports of non-arteritic anterior ischemic optic neuropathy - a condition that impacts sight - although most experts do not believe this to be related to ED medications.

It is recommended that you see a doctor in person for this issue, for a full physical exam and blood work to determine if there is an underlying cause like diabetes, vascular disease or low testosterone

Cialis isn’t for everyone. You should not take Cialis if any of the following conditions apply to you:

• You have previously experienced an allergic reaction to Tadalafil (Cialis) or any other medicines in the past
• You are taking medicines called nitrates for chest pain
• You are currently taking take any guanylate cyclase stimulators, like riociguat (adempas)
• You are using drugs such as amyl nitrate or amyl nitrite, and butyl nitrate, also known as poppers. 
• You have a serious liver or heart problem
• You have low blood pressure or a condition that may lower blood pressure like aortic stenosis or hypertrophic obstructive cardiomyopathy
• You have recently had a heart attack or stroke
• You are taking other medication for erectile dysfunction, such as Viagra.

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In Canada, Cialis is not available over the counter, so you will always need a prescription first.

If you are experiencing the symptoms of erectile dysfunction and are seeking a prescription for Cialis, talk to a doctor about whether it could be the right solution.

Yes. If left for too long, Cialis will start to lose its effectiveness. Therefore it is not recommended to take Cialis more than a year after the prescription has been dispensed.

Cialis is not a treatment for premature ejaculation, so it usually won’t impact the amount of time you can have sex for before you ejaculate.

Cialis won’t increase desire or help you feel sexually aroused when you otherwise wouldn’t be interested in sex. Cialis simply makes it easier to get an erection when you’re already sexually aroused.

According to the manufacturer, drinking excessive alcohol (they define it as 5 glasses of wine or 5 shots of whiskey) can increase your chances of getting a headache or getting dizzy, your heart rate increasing, or lowering your blood pressure.

If you’re planning on having a single beer or glass of wine you may not experience a difference in effectiveness. However, it is still sensible to minimize alcohol consumption when taking Cialis and alcohol.

Cialis does not make you bigger. By relaxing the blood vessels around the penis, Cialis and other PDE5 inhibitors may help you get and maintain an erection, but this process will do nothing for your size.

Having more blood flowing in there might make it feel bigger. More blood flowing to the penis can give you a firmer erection that may alter the sexual experience for you and your partner.