Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use Viagra (Sildenafil).

Alcohol: Consumption of alcohol in large amounts may decrease the ability to get an erection and may also temporarily decrease blood pressure, causing dizziness and fainting.

Blood pressure: Tell your doctor if you are taking medications to treat high blood pressure. The combination of these medications and Viagra (Sildenafil) may add to the blood pressure-lowering effect of these medications. You should also let your doctor know if you have or have had low blood pressure.

Grapefruit juice: Grapefruit juice can increase the amount of Viagra (Sildenafil) in your bloodstream. Do not drink grapefruit juice when taking Viagra (Sildenafil).

Hearing problems: If you experience a sudden decrease or loss of hearing you should seek medical attention immediately.

Heart conditions: If you have or have had heart disease or a heart attack or stroke, you should speak to your doctor before taking any medication for erectile dysfunction. If chest pains, dizziness, or nausea are experienced during sex, the exertion should be stopped and your doctor informed.

Kidney problems: If you have poor kidney function you may need lower doses of Viagra (Sildenafil). Kidney Disease or reduced kidney function may cause Viagra (Sildenafil) to build up in the body, causing side effects. If you have kidney problems, discuss with your doctor how Viagra (Sildenafil) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Viagra (Sildenafil), and whether any special monitoring is needed.

Liver function: If you have poor liver function you may need lower doses of Viagra (Sildenafil). Liver disease or reduced liver function may cause Viagra (Sildenafil) to build up in the body, causing side effects. If you have liver problems, discuss with your doctor how Viagra (Sildenafil) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Viagra (Sildenafil), and whether any special monitoring is needed.

Nitrate-containing medications: Viagra (Sildenafil) should never be taken with any medications that contain nitrates. Blood pressure may suddenly drop to life-threatening levels if Viagra (Sildenafil) is taken with any nitrate-containing medication (e.g., nitroglycerin tablets, spray, or patches) or any other nitrates (e.g., isosorbide dinitrate or amyl nitrite "poppers"). Dizziness, fainting spells, heart attack, or stroke may be experienced.

If use of a nitrate-containing medication is considered medically necessary, you must wait 48 hours after the last dose of Viagra (Sildenafil) before taking a nitrate, and only under close medical supervision.

Penis deformation: As with other medications for erectile dysfunction, men with an anatomical deformation of the penis such as angulation, cavernosal fibrosis, or Peyronie's disease should be closely monitored by their doctors if they take this medication.

Prolonged erection: If an erection lasts longer than 4 hours (a rare occurrence), seek immediate medical assistance. If this condition is not treated quickly, tissue damage and permanent loss of the ability to have an erection could result.

Prostate problems: Tell your doctor if you are taking medications, such as alpha-blockers (e.g., Doxazosin), to treat prostate problems, as the combination of these medications with Viagra (Sildenafil) may add to the blood pressure-lowering effect of these medications.

Sexually transmitted infections: Viagra (Sildenafil) does not protect against sexually transmitted infections such as HIV.

Vision problems/eye conditions: If you experience a sudden loss of vision in one or both eyes or other vision related problems, contact your doctor immediately. Vision loss may be partial or complete. While in some cases the condition may improve over time, it can also be permanent.

This rare condition is more likely to occur if you have heart disease, high blood pressure, High Cholesterol, Diabetes, or eye problems, are more than 50 years old, or if you smoke. If you have any eye conditions, such as retinitis pigmentosa or non-arteritic anterior ischemic optic Neuropathy (NAION), tell your doctor.

Pregnancy and breast-feeding: Viagra (Sildenafil) is not intended for use by women.

Children: Viagra (Sildenafil) is not intended for use by children or adolescents under 18 years of age.

Seniors: If you are 65 years of age or older, you may need a lower dose of Viagra (Sildenafil).

Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use Pms Sildenafil R.

Bleeding problems: Sildenafil may cause your body to take longer to stop bleeding. If you have bleeding problems or a bleeding disorder, discuss with your doctor how Pms Sildenafil R may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Blood pressure: Sildenafil can cause a rapid decrease in blood pressure that may add to the blood pressure-lowering effect of other medications. Tell your doctor if you are taking medications to treat high blood pressure. If you are taking medication for high blood pressure, discuss with your doctor how Pms Sildenafil R may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Pms Sildenafil R, and whether any special monitoring is needed.

Grapefruit juice: Grapefruit juice can increase the amount of sildenafil in your blood. Do not drink grapefruit juice while taking this medication.

Heart or blood vessel problems: Sildenafil can make heart or blood vessel problems worse. If you have had a heart attack, stroke, or life-threatening abnormal heart rhythm within the last 6 months, or have angina, chest pain, an irregular heartbeat, or high or low blood pressure, discuss with your doctor how Pms Sildenafil R may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Pms Sildenafil R, and whether any special monitoring is needed.

Liver function: If you have liver problems, discuss with your doctor how Pms Sildenafil R may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Pms Sildenafil R, and whether any special monitoring is needed. People with severely reduced liver function should not use Pms Sildenafil R.

Lung problems: Sildenafil is not recommended for people with a form of high blood pressure in the lungs called pulmonary veno-occlusive disease. If you have pulmonary veno-occlusive disease or experience sudden cough, shortness of breath, chest pain, or rapid breathing, talk to your doctor before taking Pms Sildenafil R.

Nitrate-containing medications: Sildenafil should never be taken with any medications that contain nitrates. Blood pressure may suddenly drop to life-threatening levels if sildenafil is taken with any nitrate-containing medication (e.g., nitroglycerin tablets, spray, or patches) or any other nitrates (e.g., isosorbide dinitrate or amyl nitrite "poppers"). Dizziness, fainting spells, heart attack, or stroke may be experienced.

Penis deformation: Men with an anatomical deformation of the penis such as angulation, cavernosal fibrosis, or Peyronie's disease should be closely monitored by their doctor while taking Pms Sildenafil R.

Prolonged erection: Tell your doctor if you have ever had an erection that lasted longer than 4 hours, or have Sickle Cell Anemia or Leukemia, before taking Pms Sildenafil R.

Prostate problems: Tell your doctor if you are taking medications to treat prostate problems, such as alpha-blockers (e.g., Doxazosin), as sildenafil combined with these medications may cause dangerously low blood pressure.

Vision problems: If you have or have had a temporary decrease or permanent loss of vision in one or both eyes, including a condition called non-arteritic anterior ischemic optic Neuropathy (NAION), or if you have retinitis pigmentosa, tell your doctor before taking Pms Sildenafil R.

Pms Sildenafil R can cause partial or complete vision loss that may be temporary or permanent. If you experience a sudden loss of vision in one or both eyes or other vision-related problems, contact your doctor immediately. If you do experience vision changes, do not drive or operate machinery until your vision returns to normal.

Pregnancy: Pms Sildenafil R should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking Pms Sildenafil R, contact your doctor immediately.

Breast-feeding: Pms Sildenafil R may pass into breast milk. If you are a breast-feeding mother and are taking sildenafil, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.

Children: The safety and effectiveness of this medication have not been established for children with pulmonary hypertension.