Alprostadil answers "how do we produce an erection when the normal vascular mechanism has failed?" PT-141 answers "how do we restore sexual desire when the brain's motivational circuits are underactive?" These are fundamentally different problems, and neither compound can solve the other's target indication
Think of it less as a messenger and more as a foreman on a construction site, directing the local cellular machinery to patch up damage, reinforce structures, and protect against further injury
Some have been using them for over a decade
If you are deciding between these products, the choice depends on your primary goal
The bell-shaped curve makes extrapolation unsafe
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