Viagra 150 MG

Viagra 150 MG

Generic: Viagra 150mg


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Viagra is used to treat erectile dysfunction (impotence) in men. Its active constituent is Sildenafil. Sildenafil belongs to the class of drugs termed as Phosphodiesterase inhibitors. VIAGRA does not treat erectile dysfunction permanently and is not a contraceptive. It does not enhance sexual desire. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. VIAGRA should be taken 30 to 60 minutes before sexual activity. Its effect lasts for 4 hours.  VIAGRA should be taken only once a day.


Sildenafil is used to treat erectile dysfunction. cGMP is a chemical in the body which causes relaxation of vascular smooth muscles and increases blood flow to various tissues of the body.  PDE5 (phosphodiesterase5) is an enzyme which carries out the breakdown of cGMP. It is found in the erectile tissue of the penis, vascular endothelium (walls of blood vessels) and retina of the eyes. Sildenafil increases the concentration of cGMP in tissues by inhibiting PDE5. Increased cGMP cause vasodilation of penile blood vessels which results in erection.


VIAGRA is mainly used for erectile dysfunctions, which is the main cause of impotence in males. Another brand of sildenafil named REVATIO is used for pulmonary artery hypertension in both males and females.


Dosage of VIAGRA is 50 mg. It is available in the form of oral pills. Dosage of VIAGRA varies from 25 mg to 100 mg in different people. The starting dose of 25 mg should be used in males above 65 years. It should be taken before 30 to 60 minutes of sexual activity. Do not take more than one tablet in a day. Effect of VIAGRA lasts for 4 hours. Avoid grapefruit juice and fat containing food with VIAGRA. Do not increase the dose by yourself; consult doctor if you are not getting any benefit.

Missed doses

VIAGRA is used only when needed so no chances of missed doses.


In case of over dosage consult your nearest doctor or emergency center without any delay.  The symptoms of overdose are nausea, chest pain, slow or fast heartbeat, fainting, and light-headedness.


Common side effects are:

•           Headache

•           Abdominal upset

•           Diarrhea

•           Stuffy nose

•           Heartburn

•           Drowsiness

•           Blurred vision

The above mentioned side effect are not serious and do not require medical attention. However if any of these effects prolong or if you see signs of  allergic reaction like rashes, swelling and redness of the throat/neck/lips, difficulty in breathing then immediately contact your doctor.

Serious side effects of VIAGRA are:

•           Sudden vision and hearing loss.

•           An erection that last for 4 hours (priapism)


VIAGRA is contraindicated in

•           Males allergic to sildenafil

•           Women and children.

•           Patients on nitrate therapy (nitroglycerine, isosorbide mononitrate)

•           Males using other Phosphodiesterase inhibitors or drugs for treating impotence.

•           Patients with history of stroke, blood cell disorders, disease of eyes (retinal pigmentosa), liver and/or kidney disease, retinal stomach ulcers, deformed penis shape.

•           Patients taking REVATIO (it also contains sildenafil) or any other drug which contains sildenafil.

Consult your doctor before using VIAGRA.


•           Fatty food and grapefruit/ grapefruit juice should be avoided with VIAGRA

•           Do not take alcohol while taking VIAGRA.

•           If you have sudden vision and/or hearing loss, stop taking VIAGRA.

•           Take it only once a day.


Drugs that interact with VIAGRA are:

  • Nitrates like isosorbide dinitrate, nitroglycerine, isosorbide mono nitrate.
  • Other Phosphodiesterase inhibitor.
  • Antifungals (ketoconazole)
  • Anti-ulcers (cimetidine)
  • HIV drugs (saquinavir, nevirapine)
  • Macrolide antibiotics (erythromycin)
  • Barbiturates (phenobarbitone)
  • Other drugs for the treatment of impotency should not be used with VIAGRA.

There are so many other drugs that react with VIAGRA. Always consult your doctor before using any prescription or non-prescription drugs with VIAGRA.


VIAGRA should be stored in a cool, dry and dark place. Keep it away from the reach of children and pets.

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