In Las Vegas, as in the rest of the United States, you must have a from a licensed healthcare provider to legally purchase Viagra (sildenafil). It is not available over-the-counter (OTC). Local Pharmacies in Las Vegas
Once you have a prescription, you can fill it at major retail pharmacies throughout the city, including several conveniently located near the Las Vegas Strip. Over-the-counter Viagra: 13 alternatives - Ro where can i buy viagra in las vegas