While some websites claim to sell "original" formulas, health experts and regulatory bodies urge extreme caution:

Before purchasing supplements marketed as or similar names like Stamina-Rx , it is critical to understand the serious safety warnings and historical regulatory actions associated with these products. FDA Warnings and Safety Risks

: If you find older stock in health food stores or pharmacies, do not purchase it; the FDA ordered a total recall of all lots for certain brands.

: These undeclared drugs can interact dangerously with nitrates found in common prescription medications for heart disease, high blood pressure, and diabetes.