How CIALIS became FDA approved?
The FDA is responsible for ensuring all patients that the new drugs are effective and safe. Cialis received the FDA’s approval for treating men who encountered difficulty having and maintaining erections. Although there are a lot of drugs treating this condition, Cialis is so much different from the others because it works up to 36 hours after the administration.
Preclinical trials:
The new drug is tested on animals to prove its safety.
Phase I:
Low doses of the drug are tested in a group of 20 to 80 people.
Phase II:
A study is made to observe how the drug works in a group that ranges from 25 to 300 people.
Phase III:
Studies confirm the safety and effectiveness of the drug in a few hundred to 3000 people.
Independent review by the FDA:
Based on safety and how well it works, the drug is either approved or rejected.
Phase IV:
The FDA may require a company to conduct more studies before it approves the drug.
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CIALIS - November, 21 2003 FDA (US Food and Drug Administration) approved Cialis, a new oral treatment for erectile dysfunction. Cialis' effect lasts from 12 to 36 hours after taking the pill. European label shows 24 hours efficacy for Cialis while the Australian and US label indicate efficacy up to 36 hours after taking the drug. Because Cialis remains in the human body for a longer time than Viagra or Levitra, researchers intensified tests on the risks the Cialis users might be exposed to.
VIAGRA (sildenafil citrate) produced by Pifizer is the first medicine for ED (erectile dysfunction) and was approved by the FDA on Mars 20, 1998.
LEVITRA - Aug. 20, 2003 - FDA gave Levitra green light for treating mild and severe male erectile dysfunctions.
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 If you want to buy Real Cialis from an online pharmacy we advise you to be very careful. There are many pharmacies on the Internet that look legitimate but aren’t. To be certain you purchase authentic Cialis, use a licensed pharmacy that you know for sure is reliable. We advise you to get a diagnosis for your condition and a prescription from your doctor and not use the online forms.
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