What Is Cialis (Tadalafil)?
Cialis is the brand name of tadalafil, a prescription drug for men used to treat erectile dysfunction (ED).
Tadalafil is also prescribed under the name Adcirca for treatment of pulmonary arterial hypertension.
Additionally, it has been approved to treat signs and symptoms of benign prostatic hyperplasia (BPH), or enlargement of the prostate.
Cialis was originally developed as a heart medicine by Glaxo Wellcome (now GlaxoSmithKline) in 1991, when another drug company Pfizer discovered that a similar enzyme inhibitor, sildenafil, caused erections in men taking part in a study.
The Lilly ICOS company tested Cialis as an ED medicine, and it was approved by the Food and Drug Administration (FDA) for treating ED in 2003.
Cialis was approved by the FDA in 2009 for the treatment of pulmonary arterial hypertension.
Cialis Warnings
Cialis should not be taken more than once every 24 hours.
A man needs to be sexually aroused for the medication to work. It does not provide an instant erection without stimulation.
Men who use Cialis should be healthy enough to have sex, not take nitrates for chest pain (angina), and consult a physician if an erection lasts more than four hours or is painful.
Cialis Dosage
Cialis tablets are yellow, film-coated, almond-shaped tablets, available in doses of 5, 10, and 20 milligrams (mg).
Cialis for daily use comes in 2.5 mg and 5 mg.
Recommended dosage of Cialis for ED is 10 mg, taken at least 30 minutes before sexual activity. Dosage may be increased to 20 mg or decreased to 5 mg, based of efficacy and tolerability.
Recommended dosage for Cialis once daily for ED is 2.5 mg, taken at the same time every day. Dosage may be increased to 5 mg based on efficacy and tolerability.
Recommended dosage for Cialis once daily for BPH is 5 mg, taken at the same time every day.
For pulmonary arterial hypertension patients, doses of 20, 40, and 60 mg may be prescribed. Typically, after 16 weeks of treatment, a 40 mg daily dose proved effective.
For patients experiencing both ED and BPA, the recommended dose of Cialis is 5 mg, taken at the same time every day.
Cialis Overdose
Contact your physician if you experience numbness or pain during sexual activity.
Get emergency help if you experience sudden vision loss because Cialis can decrease blood flow to the optic nerve in the eye.
Missed Dose of Cialis
Patients using Cialis may not be on a dose schedule, so simply take it as needed.
Do not take extra medicine to make up for a missed dose.
Cialis Side Effects
Common Side Effects of Cialis
- Headache
- Back pain
- Muscle aches
- Stomach pain or discomfort
- Indigestion
- Burping
- Acid reflux
- Flushing
- Stuffy or runny nose
Serious Side Effects of Cialis
- Vision impairment
- Irregular heartbeat or chest pain
- Shortness of breath
- Lightheadedness
- Sudden hearing loss.
Patients are urged to contact physicians for erections lasting more than four hours.
Cialis and Other Drug Interactions
Tell your doctor about any allergies you have, and about all the medications you take, whether prescription or over-the-counter (OTC), vitamins, illegal or recreational drugs, and dietary or herbal supplements, as they can affect how Cialis works.
Consult your doctor if you take the following medications:
- Alpha-blockers for prostate problems
- Blood pressure medications
- HIV medicines
- Oral antifungal medications
- Antibiotics
- Other medicines for ED
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