Viagra also called as Sildenafil, is a pharmaceutical drug suggested by some medical professionals to treat erectile dysfunction (ED) in men Many factors can influence how long it takes for Viagra to show its results.

Normally, Viagra starts working 30-60 minutes after it is taken in oral tablet form. For some men, it may also take up to one to two hours to work. However, your physical and emotional health, medications you are taking, diet and sleep patterns, can also affect the amount of time Viagra takes to work in your body.

Along with taking Viagra, you will also require to feel sexually stimulated to get an erection. Hence, you need to be relaxed and calm after taking Viagra to produce noticeable results for having a pleasurable sexual experience. It is usually safe to use Viagra in moderation. However, it also has side-effects, means taking more Viagra than prescribed can also lead to an allergic reaction such as swelling on face, lips, breathing problem, and hives.

As per some researchers, men taking an overdose of Viagra also have an increased risk of developing serious health issues such as heart disease, diabetes, high blood pressure, high cholesterol.  Men who suffer from kidney disease, severe liver disease, low blood pressure, heart problems, hereditary degenerative retinal disorders are advised not to take Viagra or consult a doctor first before taking medicine.

It is recommended to seek emergency medical help if you suffer from possible side-effects of Viagra such as: chest pain or pressure in the heart, shoulder pain, vomiting, sweating, indigestion, changes in eyesight, sudden vision loss, increased sensitivity to light, changes in color vision, painful erection, delayed erection, noise in your ears, sudden hearing loss, irregular heart rhythm, swelling in your hands, seizure, redness or tingly feeling, headache, dizziness, nosebleeds, insomnia, muscle pain, backache, light-headedness, stomachache, fainting during sex.

This list is not complete, and you should immediately consult a doctor or pharmacist if you notice other side-effects that are not listed here.

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