This medicine is used to treat erectile dysfunction, the inability to get or keep an erection. The medicine works by increasing blood flow to the penis during sexual stimulation; that increased blood flow causes an erection. Sildenafil has no effect on sexual desire. Yes, before starting to use sildenafil it is necessary for the doctor to evaluate your condition and determine if the use of the drug is safe in your particular case. The doctor will also advise you on the appropriate dose and adjust the dose if necessary. Viagra Cost in Usa !! Tadalafil 20 mg !! Dapoxetine Usa. Sildenafil should not be used together with medications that contain nitrates, such as isosorbide nitrate or nitroglycerin, generally used to treat angina or chest pain. If you have questions about whether any of your medications you take contain nitrates, ask your doctor or pharmaceutical chemist. This medicine may not be safe in people with very low blood pressure or uncontrolled high blood pressure (hypertension). Like all medicines, sildenafil can cause some unwanted effects in some people. The most common are headache, redness, vision changes (blurred vision or sensitivity to light), dizziness or fainting. If you have any of these discomforts or problems, see your doctor. How is it taken? The best time to take sildenafil is about 1 hour before sexual activity, but you can take it anytime, from 4 hours to 30 minutes before activity. In general, sildenafil should not be taken more than once a day. Medixo Centre brings to you an online platform, which can be accessed for all your health needs. We are trying to make healthcare a hassle-free experience for you. Get your Hepatitis, ayurvedic, homeopathic medicines, Anti Cancer & HIV and other health-related products delivered. That too in the comfort of your home. at our best discounted price then you can send us an email or for a quick response directly send a message to our WhatsApp/Viber at + 91-9999344593.