It affects the way the medicine works. If you have erection problems sildenafil works by temporarily increasing blood flow to your penis when you get sexually excited. If you have an erection that lasts more than 4 hours, get medical help right away. If you are taking sildenafil to treat PAH, you will probably take sildenafil three times a day with or without food. Be sure to let your doctor and pharmacist know that you are taking these medications before you start taking sildenafil. Pearlman says it can often take months to get an appointment with a healthcare provider who can prescribe the medications commonly used to treat ED. It is not recommended for use in Australia.About sildenafil (Viagra) Sildenafil is a medicine used to treat erection problems (erectile dysfunction). Sildenafil is also sometimes used to treat pulmonary hypertension (high blood pressure in the blood vessels that supply the lungs). If you have erection problems sildenafil works by temporarily increasing blood flow to your penis when. But they don’t work for everyone, and you may need to avoid them if you’re taking certain other medications, like nitrates, or if you have certain health conditions, such as low . Viagra alternatives range from medical options like Cialis and Levitra to natural methods like acupuncture and even therapy. We break them all down here. Share on Pinterest.

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