Pfizer Inc. has registered Viagra as a trademark. It’s active ingredient is sildenafil citrate. There are three different sizes of doses. There is the 50mg, 25 mg and the 100 mg that you will only be able to get by prescription. This is an oral pill that can help to treat ED.
Viagra increases the blow flow to the penis to enable the patient’s ability to achieve and maintain their erection when stimulated.
Women and children should never take Viagra along with men who are taking nitroglycerin.
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