Viagra generally refers to sildenafil citrate tablets. If there is no decline in liver or kidney function, cardiorespiratory function, or if you are not using nitrate-type stress-reducing drugs, it is unlikely that serious harm will occur with the use of sildenafil once, but side effects such as dizziness and headache may occur, and you need to follow your doctor’s instructions for use of the drug.
Sildenafil tablets belong to the prescription drugs, there are certain use of the crowd as well as side effects, even if the occasional use of a time, need to be used under the guidance of a doctor. Because some patients are accompanied by liver and kidney insufficiency, or cardiopulmonary function decline, such patients, although only used once, may cause organ damage to further aggravate.
In addition, sildenafil has the effect of vasodilatation, if in the use of nitrate antihypertensive drugs in the population, taking sildenafil tablets, although only used once, may also cause severe hypotension adverse reactions.
Overall, the use of sildenafil once in general will not affect the body, but it needs to be used under the guidance of a doctor, not blindly.