Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or alcohol. Its effects often last for 4 to 5 hours. It might work longer if you have mild to moderate erectile dysfunction. Vardenafil. See more.You may have your doctor’s office directly submit the script to your preferred pharmacy, or you can take it with you and use the script to purchase Viagra at a pharmacy or online. Especially tell your healthcare provider if you take any of the following: medicines called nitrates medicines called guanylate cyclase stimulators such as Adempas riociguat medicines called alpha-blockers, such as Hytrin terazosin HCl , Flomax tamsulosin HCl , Cardura doxazosin mesylate , Minipress prazosin HCl , Uroxatral alfuzosin HCl , Jalyn dutasteride and tamsulosin HCl , or Rapaflo silodosin. There are online sources that will provide “Viagra” without a prescription, but this is an illegal action and, in the interests of your own safety, you should only consider purchasing Viagra from reputable and legal sources. These are commonly prescribed for an enlarged prostate or male pattern baldness. Severe liver disease. It might work longer if you have mild to moderate erectile dysfunction. This boosts blood flow and helps you get an erection from sexual activity.CHOOSE BRAND-NAME VIAGRA. The original little blue pill prescribed by doctors for over 20 years. Clinically proven to treat men with erectile dysfunction (ED) Ongoing . · Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Stop taking sildenafil and . What to consider. Cost. Overdose. Ask your doctor. Q&A. Drug Images. What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that .If Viagra is not covered, you may want to check to see if similar drugs that help treat erectile dysfunction, like Cialis or Levitra, are covered by your health insurance plan. You should also ask what results should expect from using the medication. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. This medicine also works best when you take it an hour before sex on an empty stomach. How often do you experience it?
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