Pfizer Viagra seems very stable
[QUOTE=BananaBoi;2557571]Like many medications, don't these "drugs" lose their effectiveness if they are exposed to extreme heat?
[/QUOTE]I once unintentionally left a bottle of Viagra in my car for about a week during the hot summer. The sun must have heated the pills to be well above proper storage temperature for quite some time. Those pills worked without issue.
Years ago I stock piled Viagra because I didn't know when my insurance would stop paying for them. Those pills worked fine at least 5 years beyond their expiration date.