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Those using protease inhibitors are recommended to limit their use of sildenafil to no more than one 25 mg dose every 48 hours. blocker (typically prescribed for hypertension or for urologic conditions, such as benign prostatic hypertrophy) at the same time may lead to low blood pressure, but this effect does not occur if they are taken at least 4 hours apart. doxycycline 200 mg Cialis (tadalafil) relaxes muscles of the blood vessels and increases blood flow to particular areas of the body. Cialis is used to treat erectile dysfunction (impotence) and symptoms of benign prostatic hypertrophy (enlarged prostate). Another brand of tadalafil is Adcirca, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. Do not take Cialis while also taking Adcirca, unless your doctor tells you to. 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Cialis tablets contain the active ingredient tadalafil, which is a type of medicine called a phosphodiesterase type 5 inhibitor. If you suffer from erectile dysfunction, tadalafil helps you to achieve and maintain an erection by helping more blood get into your penis when you are sexually aroused. An erection is produced via a complex chain of events, involving signals from the nervous system and the release of chemical messengers within the tissues of the penis. One of the messengers released when you're aroused is called cyclic GMP. Cyclic GMP relaxes and widens the blood vessels in the penis, allowing more blood to enter. Cyclic GMP is normally broken down by an enzyme in the body called phosphodiesterase type 5 (PDE5). Tadalafil works by stopping this enzyme from breaking down the cyclic GMP. This allows the blood vessels in the penis to stay dilated for longer, which improves blood flow to the penis and helps produce and maintain an erection. Low blood pressure might seem desirable, and for some people, it causes no problems. However, for many people, abnormally low blood pressure (hypotension) can cause dizziness and fainting. In severe cases, low blood pressure can be life-threatening. A blood pressure reading lower than 90 millimeters of mercury (mm Hg) for the top number (systolic) or 60 mm Hg for the bottom number (diastolic) is generally considered low blood pressure. If you have indications of shock, seek emergency medical help. If you have consistently low blood pressure readings but feel fine, your doctor is likely just to monitor you during routine exams. Even occasional dizziness or lightheadedness may be a relatively minor problem — the result of mild dehydration from too much time in the sun or a hot tub, for example. Tadalafil for high blood pressure MSN - Cialis, Buy Cialis, Cheap Cialis, Buy Cheap, Treating Erectile Dysfunction When You Have High Blood Pressure Can clonidine be used for anxiety Mar 3, 2011. 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