That depends on the online pharmacy and is changing. And what about drugs that decrease the effect of Viagra on your erections? Viagra Warnings Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. Still other online pharmacies specialize in medications for only a select few health concerns or conditions. If chest pains, dizziness, or nausea are experienced during sex, the exertion should be stopped and your doctor informed. Always take Viagra under the supervision of a licensed medical professional, who can properly monitor your dose and any side effects. Nitrate-containing medications: Viagra Sildenafil should never be taken with any medications that contain nitrates.Can you get Viagra without a prescription? You cannot legally get Viagra in the United States and most other countries without a prescription. The United Kingdom is one notable exception.  · There’s a Free, Low-Risk Alternative to Viagra, Study Shows. Regular exercise sessions can be as effective as popping Viagra pills when it comes to dealing with erectile dysfunction (ED). According to new research, just three 30 minute sessions per week could be enough to see a difference. Researchers from the Baylor College of . Depending on your symptoms and needs, you may be prescribed Viagra, sildenafil, Cialis, tadalafil, Stendra, paroxetine, or a combination of tadalafil and sildenafil, available as mints or pills. Prices range from $3 to $ per dose or $82 to $ for a monthly supply, depending on the medication.