Using our ED service, you can get erectile dysfunction pills online safely and have them delivered to your door in just a couple of days. More serious side effects may include a drop in blood pressure or an erection that lasts longer than four hours. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. Can I buy ED pills online? People with heart conditions should never take ED medications without consulting a doctor. Psychological factors like stress, depression, or anxiety can also contribute. Medical consultations were also taken into consideration, as PDE5 inhibitors require a valid prescription from a licensed medical provider.Ask Your Doctor Ask your doctor to prescribe brand-name VIAGRA and to indicate “DAW” (Dispense As Written)—or the language used in your state—on all of your VIAGRA Missing: shipping. Viagra is available in mg, mg, and mg doses and can be purchased in day and day supplies. Shipping is free, and your new medication . Cart. Transfer your prescription for Sildenafil (Generic for Viagra, Oral Tablet) on Amazon Pharmacy. FREE SHIPPING for Prime members.