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The recommended dose of Viagra is 25-100 mg taken 30 minutes to 4 hours before sexual activity. Viagra increases the effects of blood pressure lowering medications. It also increases the blood pressure lowering effects of nitrates (for example, isosorbide dinitrate) that are used primarily for treating angina. Patients taking nitrates should not receive Viagra. Viagra should not be combined with Revatio or other PDE5 inhibitors (for example, Levitra [vardenafil], Cialis [tadalafil]). Tagamet (cimetidine), erythromycin, ketoconazole, Sporanox (itraconazole), and Posicor (mibefradil) can cause marked increases in the amount of Viagra in the body. Patients taking these medications should be observed carefully if Viagra is used. Diarrhea 0% 1% 2% cheap cialis online canadian pharmacy We never answer drug or health related questions so please don't e-mail us with your drug related questions.

abdominal or stomach painIf you are taking sildenafil to treat erectile dysfunction, follow your doctor's directions and the guidelines in this paragraph. Take sildenafil as needed before sexual activity. The best time to take sildenafil is about 1 hour before sexual activity, but you can take the medication any time from 4 hours to 30 minutes before sexual activity. Sildenafil usually should not be taken more than once every 24 hours. If you have certain health conditions or are taking certain medications, your doctor may tell you to take sildenafil less often. You can take sildenafil with or without food. However, if you take sildenafil with a high-fat meal, it will take longer for the medication to start to work. 20 mg levitra Three studies were conducted in men to assess the potential effect on spermatogenesis of CIALIS 10mg (one 6-month study) and 20mg (one 6-month and one 9-month study) administered daily. In two of these studies decreases were observed in sperm count and concentration related to tadalafil treatment of unlikely clinical relevance. These effects were not associated with changes in other parameters, such as motility, morphology, and FSH. fast heartbeat

In those patients already taking an optimized dose of PDE5 inhibitor, alpha-blocker therapy should be initiated at the lowest dose. Stepwise increase in alpha-blocker dose may be associated with further lowering of blood pressure in patients taking a PDE5 inhibitor.Tell your healthcare provider about all the medicines you take, especially: medicines called "nitrates" which are often prescribed for chest pain medicines called guanylate cyclase stimulators, such as riociguat (Adempas?), used to treat pulmonary arterial hypertension and chronic-thromboembolic hypertension alpha-blockers often prescribed for prostate problems blood pressure medications medicines for HIV or some types of oral antifungal medications some types of antibiotics such as clarithromycin, telithromycin, erythromycin (several brand names exist, please contact your healthcare provider to determine if you are taking this medicine) other medicines or treatments for erectile dysfunction (ED) CIALIS is also marketed as ADCIRCA for the treatment of pulmonary arterial hypertension. Do not take both CIALIS and ADCIRCA. Do not take sildenafil citrate (Revatio?)* with CIALIS. levitra effects WHO SHOULD NOT TAKE LEVITRA?

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Related treatment guides levitra cialis There are no controlled clinical data on the safety or efficacy of vardenafil in the following patients; and therefore its use is not recommended until further information is available: unstable angina; hypotension (resting systolic blood pressure of <90 mmHg); uncontrolled hypertension (>170/110 mmHg); recent history of stroke, life-threatening arrhythmia, or myocardial infarction (within the last 6 months); severe cardiac failure.No tome tadalafil si usted también esta usando un nitrato para el dolor de pecho o problemas del corazón. Estos incluyen nitroglycerin, isosorbide dinitrate, y isosorbide mononitrate. Los nitratos también se encuentran en algunas de las drogas de diversión, como amyl nitrate o nitritos ("poppers"). Tomar tadalafil con un nitrato puede causar una disminución repentina y grave en la presión arterial. 40. Boshier A, Pambakian N, Shakir SA "A case of nonarteritic ischemic optic neuropathy (NAION) in a male patient taking sildenafil." Int J Clin Pharmacol Ther 40 (2002): 422-3

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