Keep from freezing. It might work longer if you have mild to moderate erectile dysfunction. To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and site usage information with other information we have about you. If you are a Mayo Clinic patient, this could include protected health information. Testosterone Replacement Erectile dysfunction can sometimes be a result of low testosterone levels. · Sildenafil (Oral Route) Description and Brand Names Before Using Proper Use Precautions Side Effects Products and services Proper Use Drug information .  · Exercise sessions involving aerobic activities such as walking or cycling, undertaken for at least half an hour three times a week, were shown to improve erectile .  · Studies have shown that propionyl-L-carnitine combined with Viagra might improve erectile function better than sildenafil alone. Propionyl-L-carnitine is likely to be .