(Sildenfil Citrate): The pill originally intended to treat heart disease is now used to treat erectile dysfunction. This particular PDE-5 agent can cause, on rare occasions, blue-green shading of vision due to high blood levels of the drug. This temporary and poses no long-term risk. Viagra usually works 1-4 hours after you take it. For more information, you can visit www.viagra.com.
(Taladafil): This tablet is similar to Viagra, though it may have a longer duration of action. For more information, you can visit www.cialis.com.
(Vardenafil HCl): This tablet should be taken approximately one hour before sexual activity. For more information you can visit www.levitra.com.
(Alprostadil): This ED medication is injected directly into the corpora cavernosa of the penis. For more information you can visit www.caverject.com.
A urethral suppository of alprostadil, eliminating the need for injection. It is inserted directly into the penile urethra using a small, narrow tube. For more information, you can visit www.muserx.com.