Highlights for phenoxybenzamine
phenoxybenzamine Side Effects
Side effects that you should report to your doctor or health care professional as soon as possible:\n-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue\n-confusion\n-dizziness or drowsiness\n-feeling faint or lightheaded\n-fast or irregular heartbeat, palpitations or chest pain\n-unusually weak or tired\n-vomiting\n\nSide effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):\n-headache\n-nasal stuffiness\n-nausea\n-sexual difficulties for men
phenoxybenzamine May Interact with Other Medications
- epinephrine\n-medicines for colds and breathing difficulties\n-medicines for high blood pressure\n-medicines used to treat erectile dysfunction (ED) like sildenafil, tadalafil, and vardenafil\n-other alpha-blockers like alfuzosin, doxazosin, phentolamine, prazosin, tamsulosin, terazosin\n-reserpine
How to Use phenoxybenzamine
Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Take your doses at regular intervals. Do not take your medicine more often than directed. Do not stop taking except on the advice of your doctor or health care professional.\n\nTalk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
They need to know if you have any of the following conditions:\n-heart or circulation disease\n-kidney disease\n-shock\n-stroke\n-an unusual or allergic reaction to phenoxybenzamine, other medicines, foods, dyes, or preservatives\n-pregnant or trying to get pregnant\n-breast-feeding
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
Visit your doctor or health care professional for regular checks on your progress.\n\nDrowsiness and dizziness are more likely to occur after the first dose, after an increase in dose, or during hot weather or exercise. These effects can decrease once your body adjusts to this medicine. Do not drive, use machinery, or do anything that needs mental alertness until you know how this drug affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol can make you more drowsy and dizzy. Avoid alcoholic drinks.\n\nDo not treat yourself for coughs, colds, or pain while you are taking this medicine without asking your doctor or health care professional for advice. Some ingredients may increase your blood pressure.\n\nYour mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water may help. Contact your doctor if the problem does not go away or is severe.
Keep out of the reach of children.\n\nStore at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Keep container tightly closed. Throw away any unused medicine after the expiration date.
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Last Updated: July 16, 2009