4 Single Use Tubes in each box of Eroxon Erectile Dysfunction Treatment Gel, Clinically Proven Topical Treatment for Adult Men Fast-Acting: Clinically proven to work within 10 minutes*; While it may not work for everyone, studies showed success in over 60 percent of men FDA-cleared: The first and only FDA-cleared ED treatment available without prescription made in the US How To Use: Apply full tube of gel on the head of the penis and massage for 15 seconds; for best results, use Eroxon when sexually stimulated and with a partner as part of foreplay