Cialis (tadalafil) is a drug intended for the treatment of male impotence. It is not going to cure your impotence rather than give you a possibility to have sex being sure your erection will remain stable for as long as needed to complete sexual intercourse. While some interactions with Cialis can worsen your side effects, others can cause serious and even life-threatening health consequences. Never combine Cialis with recreational drugs, certain alpha-blocker medications, nitrates, or nitroprusside, as a dangerous drop in blood pressure is possible. This can lead to a stroke, heart attack and fainting because the medications mentioned above are known to lower your blood pressure significantly. Other drugs that should not be used or can be used with caution if approved by your health care provider can include any of the following: antidepressants, erythromycin, isoniazid, clarithromycin, imatinib, heart or blood pressure medications, seizure medications, dalfopristin, HIV/AIDS medicines, conivaptan, telithromycin, antifungal medications, doxazosin, diclofenac, and rifampin. This list is not complete and there are other medications that you may be taking and therefore need to report. If you are using a number of drugs for some condition, it’s a good idea to make a list and demonstrate to your health care provider to make sure every detail is taken into consideration. The dose you are prescribed depends on the severity of your impotence, your age and a number of risk factors. Men older than 65 are most likely to be prescribed the lowest dose of Cialis as they tend to be more sensitive to the effects of this drug. You will need to tell your health care provider if you have any of the following medical conditions before starting the treatment as they can significantly affect the dose you are prescribed: history of painful/prolonged erection, blood system cancers, coronary artery disease, bleeding disorders, active stomach ulcers, Peyronie's disease, sickle cell anemia, fibrosis/scarring, eye problems, penis angulation, liver disease, recent stroke, and kidney disease. The following mild side effects are not supposed to be reported unless they change in intensity: pain in arms or legs, headache, dizziness, back pain, nasal stuffiness, vision changes, muscle pain, flushing, and stomach upset. Make sure you talk to your doctor as soon as possible if you get such serious side effects as vision changes, sudden vision loss, priapism, seizure, swelling in your hands, ankles, or feet, irregular heartbeat, general ill feeling, light-headedness, shortness of breath, sweating, sudden hearing loss, chest pain, and fainting, as these symptoms are unlikely to go away on their own and can worsen over time. Never use more of Cialis than prescribed, as there is a risk of developing overdose symptoms, such as headache, erection that lasts longer than 4 hours, chest pain, stuffy or runny nose, heartburn, pain in the back, indigestion, and flushing. If you have taken too much of Cialis, seek emergency medical help.