Viagra (sildenafil) is a drug that should be combined with a certain amount of sexual stimulation for the patient to achieve a normal erection and be able to have sex. This also means that Viagra is not going to cause an erection by itself. Make sure you take Viagra an hour before you are planning to have sex, as it is most efficient that way. You can expect the effects of Viagra to last for as long as 6 hours, although this period may be slightly different for different patients and depend on a number of individual factors. Viagra is a relatively safe medication that is not expected to cause addiction, tolerance or any serious side effects, except for some rare cases when the patient did not mention the presence of a certain risk factor (taking some drugs that can interact with Viagra, having been diagnosed with certain medical conditions etc). Make sure you have an honest conversation with your health care provider before asking him for a prescription and mention any prescription and over-the-counter drugs you are taking, as well as any diseases you have that can make your treatment less efficient. The following disease should be mentioned, as not only can they affect the dose prescribed, but also require some additional tests to be done to establish whether taking Viagra is going to be safe for you: stroke, blood circulation problems, high cholesterol, pulmonary veno-occlusive disease, bleeding disorder, heart, kidney, or liver disease, stomach ulcer, chest pain, blood cell problems, high or low blood pressure, irregular heartbeat, heart attack, or diabetes. Some drugs that you may be using at the moment or are going to use are supposed to be communicated to your health care provider before you start taking Viagra. The following medications are usually reported to make sure your doctor will prescribed a dose high enough to be efficient, yet low enough to avoid interference with other medicines: rifabutin, medications for seizures, barbiturates, HIV protease inhibitors, anticoagulants, medications for high blood pressure, cimetidine, efavirenz, alpha blockers, other erectile dysfunction medications, beta blockers, rifampin, erythromycin, and certain antifungals. Make sure that your health care provider is aware of any other health problems you have or used to have, besides impotence, as some of them can affect the quality of your treatment, making it less efficient. Do not combine Viagra with alcohol as you may experience worsened side effects as a result. The following side effects are possible when you first start taking Viagra: warmth or redness in your face or chest, back pain, stuffy nose, upset stomach, memory problems, and headache. More serious side effects can be rash, severe loss of vision, fainting, blurred vision, chest pain, ringing in ears, shortness of breath, loss of hearing, dizziness, itching or burning during urination, priapism, and lightheadedness, and you will need to report them to your doctor as soon as possible to make sure the treatment is efficient and you are getting all the benefits possible.
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