Safety Information
Before beginning a treatment you have to inform your doctor the following

*Your old and new medical history

*Allergies if any

*Medicines you are currently taking (prescription and nonprescription medications, vitamins, and nutritional supplements)



Do not take sildenafil if you are taking or recently had taken nitrates (medicines for chest pain) such as isosorbide dinitrate (Isordil), isosorbide mononitrate (ISMO, Imdur), and nitroglycerin (Nitro-Dur, Nitro-BID, Nitroquick, Nitrostat, others).

Nitrates may be available in the form of tablets, sublingual (under the tongue) tablets, sprays, patches, pastes, and ointments. Check with your doctor if you are not sure whether any of your medicines comprise nitrates.



Do not take street drugs carrying nitrates such as amyl nitrate and butyl nitrate (poppers) while using sildenafil.



Mention if you are taking the following medicines:

Alpha-blockers such as doxazosin (Cardura), alfuzosin (Uroxatral), prazosin (Minipress), tamsulosin (Flomax), and amlodipine (Norvasc), terazosin (Hytrin).

Certain antifungals, for instance, itraconazole (Sporanox) and ketoconazole (Nizoral);

Anticoagulants like warfarin (Coumadin);

Certain barbiturates, for instance, butalbital (in Esgic-Plus, in Fioricet, in Fiorinal, others) and secobarbital (Seconal);

Aeta-blockers like atenolol (Tenormin), labetalol (Normodyne), metoprolol (Lopressor, Toprol XL), nadolol (Corgard), and propranolol (Inderal); bosentan (Tracleer); cimetidine (Tagamet); efavirenz (Sustiva); erythromycin (E.E.S., E-Mycin, Erythrocin);

HIV protease inhibitors including amprenavir (Agenerase), atazanavir (Reyataz), darunavir (Prezista), fosamprenavir (Lexiva), indinavir (Crixivan), lopinavir (in Kaletra), nelfinavir (Viracept), ritonavir (Norvir, in Kaletra), saquinavir (Fortovase, Invirase), and tipranavir (Aptivus); nevirapine (Viramune); other prescriptions to heal erectile dysfunction; medications for high blood pressure; some medications for seizures like carbamazepine (Carbatrol, Epitol, Tegretol), phenobarbital, and phenytoin (Dilantin, Phenytek); rifabutin (Mycobutin); and rifampin (Rifadin, Rimactane). Your doctor may require to change the doses of your medications or watch you carefully for side effects. Many other medicines may also combine with sildenafil, so be sure to tell your doctor about all the medicines you are taking, even if those that do not appear on this list.



Tell your doctor what herbal products you are having or plan to take, particularly St. Johns wort.



Tell your doctor if

You are a smoker

You had a history of an erection that lasted for several hours, and

You have recently lost a large quantity of body fluids. (This can happen if you are unwell with fever, diarrhea, or vomiting; sweat a lot; or do not drink sufficient liquids).

You ever had Pulmonary Veno-Occlusive disease (PVOD; blockage of veins in the lungs);

Ulcer; heart, kidney, or liver disease;

A heart attack; An irregular heartbeat; stroke; or chest pain

High or low blood pressure;

High cholesterol;

Bleeding issues or blood circulation problems;

Sickle cell anemia (a condition of the red blood cells),

Multiple myeloma (cancer of the plasma cells), or

Leukemia (cancer of the white blood cells);

Conditions affecting the shape of the penis (e.g., angulation, cavernosal fibrosis, or Peyronies disease);

Diabetes.

Also, inform your doctor if you or any of your family members have or have ever had an eye condition known as retinitis pigmentosa (an inherited eye condition that causes loss of vision)

Or if you have ever had unexpected severe vision loss, particularly if you were told that the vision loss was created by a blockage of blood flow to the nerves that support eyesight.



Tell your doctor if you are carrying, conceiving to become pregnant, or are a nursing mother. If you become pregnant while taking sildenafil, Inform your doctor.



If you are planning to have surgery, including dental surgery, tell your doctor or dentist that you are taking sildenafil.



If you are taking sildenafil to treat erectile dysfunction, notify your doctor if you have ever been told by a health care professional to avoid sexual activity for medical reasons or if you have ever encountered chest pain while sexual activity. Sexual activity may be a pressure on your heart, particularly if you have heart disease. If you undergo chest pain, dizziness, or nausea while sexual activity, call your doctor promptly and avoid sexual activity until your doctor instructs you differently.

Tell all your medical specialist that you are taking sildenafil. If you ever need an emergency medical procedure for a heart problem, the health care providers who attend you will need to know when you last had sildenafil.

Ask your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine.

If you are using sildenafil for erectile dysfunction, it is alright even though you missed any dose as it is not a part of regular medication. But take it soon after you remember if it is before having sex. Do not take a double dose ever.