Common side effects include headache, facial flushing, indigestion, and dizziness. Make sure to get an estimate of when you can expect your prescription in the mail. Read more on male sexual health on the Sexual Health Australia site. Psychological factors like stress, depression, or anxiety can also contribute. Do not stop taking sildenafil without talking to your doctor.AdSave Time & Money with Online Prescription for Viagra, Cialis, Sildenafil and Tadafil. Free & Private Online Consultant with Real Doctors. Reliable E.D. Meds Shipped test1.ru Shipping · Discreet Packaging · Real Doctors · Personalized Plan/5 (3, reviews)Site visitors: Over 10K in the past month. Medications Prescribed: Viagra, Cialis, Cialis Daily, Levitra, tadalafil, sildenafil, vardenafil. Generic offered: Yes. Why We Chose It. The simple combination of Rex MD’s online platform, its helpful customer service, and the abundance of ED treatment options make it a one-stop shop for all your sexual health needs. Sildenafil (Viagra) is a medicine used to treat erectile dysfunction (ED, also called impotence). Sildenafil works by helping to relax the blood vessels in the penis, allowing more blood to flow in and cause an erection. You should take sildenafil about an hour before planned sexual activity, so it has time to work.