Hair Loss Treatment Type:
Over the counter.
Tagamet is an antacid, anti-heartburn drug that is available over the counter. In large multiple doses daily, it can have anti-androgen effects. These effects are fairly weak though and you have to take a fairly large amount of the drug to get them, which means it is not a recommended anti-androgen treatment. Some people may have an adverse reaction that causes some hair loss as well.
Anti-androgenic effects such as libido loss and gynocomnestia are known side effects.
Well tested (in FDA trials)
Some possible side effects, listed on box.
Where you can get it:
Any grocery or drugstore, it is an over-the-counter drug for heartburn.