Other conditions that may disqualify you from an ED prescription include a history of stroke, kidney or liver disease, cancer, diabetes, or a bleeding disorder. Where can I get a blood pressure BP reading? People taking nitrates like nitroglycerin Nitrostat or isosorbide mononitrate Imdur should not take PDE5 inhibitors, as doing so could result in a dangerous drop in blood pressure. A phone or video consultation is sometimes required for legal purposes. This information is reviewed by a licensed practitioner who will assess your eligibility for the medication. Just visit a participating pharmacy. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss.Viagra’s effects typically last for at least 4 hours. But it can stay in your system for up to 20 hours (close to a day). Avoid taking Viagra at the same time as . F W RICHARDS JR INC. $ N Main St. Chase City, VA mi. Closed. () Get Coupon.  · FAQs. Factors affecting dosage. How to take. Missed dose. Overdose. Takeaway. Drug Images. Viagra treats erectile dysfunction (ED) in adults. It’s usually Missing: pick up.