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2. Sildenafil - Wikipedia

   en.wikipedia.org/wiki/Sildenafil

   Pfizer's patents on Viagra expired outside the US in 2012; in the US they were set to expire, but Pfizer settled litigation with each of Mylan and Teva which agreed that both companies could introduce generics in the US on 11 December 2017. [87] [88] In December 2017, Pfizer released its own generic version of Viagra. [89] [90]

3. The Merck Manuals - Wikipedia

   en.wikipedia.org/wiki/The_Merck_Manuals

   Since then, several manuals have been produced, and are regularly updated. The titles include: [2] The Merck Manual of Diagnosis and Therapy, commonly called The Merck Manual. This is the descendant of the 1899 book. The Merck Manual—Home Health Handbook is a consumer edition, introduced in 1997. An updated third edition was released in 2009.

4. Things You Probably Don't Know About Viagra (Like What ... - AOL

   www.aol.com/things-probably-dont-know-viagra...

   Viagra usually starts working 30 to 60 minutes after taking it. But simply swallowing the little blue pill won’t automatically make you hard — you still have to be aroused, either through ...

5. Merck Manual of Diagnosis and Therapy - Wikipedia

   en.wikipedia.org/wiki/Merck_Manual_of_Diagnosis...

   The first edition of The Merck Manual was published in 1899 by Merck & Co., Inc. for physicians and pharmacists and was titled Merck's Manual of the Materia Medica. [6] [7] The 192 page book which sold for US $1.00, was divided into three sections, Part I ("Materia Medica") was an alphabetical listing of all known compounds thought to be of therapeutic value with uses and doses; Part II ...

6. 22 Ways Men Can Make Their Orgasms Better - AOL

   www.aol.com/23-ways-men-orgasms-better-211300041...

   Here’s a fun fact, actually: According to Johnson, the main active ingredients of erectile dysfunction medications Cialis and Viagra—tadalafil and sildenafil—work by lowering blood pressure.

7. 5 Must-Know Tips Before Taking Sildenafil 100mg - AOL

   www.aol.com/5-must-know-tips-taking-105700758.html

   Like other medications, sildenafil citrate comes in several doses, ranging from as little as 25 mg a tablet (20 mg when referring to the generic version of Revatio — a medication for a type of ...

8. How to Take Viagra for Best Results - AOL

   www.aol.com/viagra-best-results-105700318.html

   Like other prescription medicines, Viagra and its generic form, sildenafil, work best when you take them under the right conditions. From your mental state to your eating habits, a range of ...

9. Generic drug - Wikipedia

   en.wikipedia.org/wiki/Generic_drug

   In some countries, such as Brazil (photo) and France, more than 20% of all drug sales in units are generic. A generic drug is a pharmaceutical drug that contains the same chemical substance as a drug that was originally protected by chemical patents. Generic drugs are allowed for sale after the patents on the original drugs expire.