Safety Information
For Viagra:
If you are taking any of the following medicines notify it to your physician before starting Viagra:
Bosentan (Tracleer);
A blood thinner, for eg. warfarin (Coumadin);
Cimetidine (Tagamet HB, Tagamet);
An antibiotic, for eg, erythromycin (Eryc, E-Mycin, Ery-Tab) or clarithromycin (Biaxin);
Doxazosin (Cardura), Terazosin (Hytrin), prazosin (Minipress)

HIV medicines including tipranavir (Aptivus), amprenavir (Agenerase), , darunavir (Prezista), nevirapine (Viramune), efavirenz (Sustiva), indinavir (Crixivan), lopinavir/ritonavir (Kaletra), saquinavir (Invirase, Fortovase), fosamprenavir (Lexiva), atazanavir (Reyataz), ritonavir (Norvir), or nelfinavir (Viracept);

An antifungal medication like itraconazole (Sporanox) or ketoconazole (Nizoral);

Carbamazepine (Tegretol), phenobarbital (Luminal), or phenytoin (Dilantin); or

Rifampin (Rimactane, Rifadin) or rifabutin (Mycobutin).

Discuss your old and new clinical history in detail with your doctor before commencing treatment with any new medication. If you are using any herbal supplements or OTC, like vitamin pills, then communicate it to your doctor. Also, tell your doctor if you are taking the following:
(Nitro-Bid, Nitro-Dur, Nitrostat, Minitran, Nitrolingual, Deponit, Transderm-Nitro), isosorbide dinitrate (Isordil, Dilatrate-SR, Sorbitrate), and isosorbide mononitrate (ISMO, Imdur, Monoket), or recreational medications like amyl nitrate or nitrite ("poppers").

Do not take Viagra if you had a history of an allergic reaction to it or if you have heart problems critical enough to make sexual activity unsafe.

If you had a stroke, heart attack, or life-threatening heart variations in the past 6 months use it carefully. Also be careful in case you have seriously unstable blood pressure, cardiac arrest, or unpredictable angina.

In case you have cardiac issue indications like nausea, dizziness, and chest pain while sex, discontinue the activity and take the recommendation of the doctor before restarting the medicine again.

In ailments like sickle cell anemia, multiple myeloma (a condition of the bone marrow), or leukemia use Viagra with care. In the case of genital obstacles or damages, for instance, Peyronies disease use Viagra carefully.

If an erection lasts for more than 4 hours, seek help quickly as it might lead to persistent sexual disorders.

If you are grieving from diseases like bleeding disorder, a stomach ulcer, or the inherited eye condition identified as retinitis pigmentosa use Viagra with caution.

For Cialis:
Discuss all recent and past medical history in detail with your doctor before beginning medication. If you are taking any herbal supplements or OTC medication, such as vitamin pills, then mention it to your doctor.

Please communicate to your doctor if you have or had medical conditions that have prescribed you to take a nitrate drug.
Doctors warn against using the drug if you are allergic to any element in it or if you are also using a nitrate drug for chest pain or heart problems, like
nitroglycerin (Nitrolingual, Nitrostat, Nitro-Bid, Nitro-Dur, Minitran, Deponit, Transderm-Nitro),
Isosorbide dinitrate (Isordil, Dilatrate-SR, Sorbitrate),
Isosorbide mononitrate (Imdur, Monoket, ISMO,), or recreational drugs like amyl nitrate or nitrite ("poppers").

Cialis, when had with a nitrate medicine, can cause a serious drop in blood pressure, resulting in fainting, stroke, or heart attack. Tell your doctor if you have any of the subsequent conditions before taking tadalafil:
A recent record a heart attack (within the last 90 days);
A recent reecord of stroke or congestive heart failure (within the last 6 months);
Angina (chest pain);
High or low blood pressure;
Liver disease;
Kidney disease (or if you are on dialysis);
A blood cell disease such as sickle cell anemia, or disorders like multiple myeloma, leukemia;
A bleeding disorder such as hemophilia;
A stomach ulcer;
Retinitis pigmentosa (an inherited condition of the eye);
A physical deformity of the penis (for example, Peyronies disease); or
If you have been advised not to have sexual intercourse due health reasons you should avoid taking these medicines.