Maxgun Sublingual Spray is marketed as an erectile-dysfunction (ED) medicine. Available product listings identify sildenafil as the active ingredient, with some listings specifying 12.5% w/v.
Use: Helps men achieve/maintain an erection when sexually stimulated.
How it works: Sildenafil is a PDE-5 inhibitor that increases blood flow to the penis.
Sublingual: It is sprayed under the tongue rather than swallowed as a tablet.
Important: Do not use sildenafil with nitrate medicines (such as nitroglycerin/isosorbide), because the combination can cause a dangerous drop in blood pressure.
Possible side effects include headache, flushing, dizziness, indigestion, and visual changes.
There are conflicting online listings about the exact Maxgun formulation, so check the strength printed on your bottle before using it.
If you tell me the strength written on your Maxgun bottle (e.g., 12.5% or number of mg per spray), I can explain the correct way to use it and the usual dose.