Before taking carvedilol,
tell your doctor and pharmacist if you have are allergic to carvedilol, any other medications, or any of the ingredients in carvedilol tablets and extended- release capsules. Ask your pharmacist for a list of the ingredients.
tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, herbal products, and nutritional supplements you are taking or plan to take. Be sure to mention any of the following: cimetidine; clonidine (Catapres, Kapvay, in Clorpres), cyclosporine (Gengraf, Neoral, Sandimmune); digoxin ( Lanoxin); diltiazem (Cardizem, Cartia, Dilacor, Taztia, Tiazac); epinephrine (Epipen); fluoxetine (Prozac, Sarafem, Selfemra, in Symbyax); insulin; oral medications for diabetes; monoamine oxidase inhibitors (MAOIs) such as isocarboxazid (Marplan), phenelzine (Nardil), tranylcypromine (Parnate), and selegiline (Eldepryl, Emsam, Zelapar); paroxetine (Brisdelle, Paxil); propafenone (Rythmol); quinidine; reserpine; rifampin (Rifadin, Rimactane, in Rifater, in Rifamate); and verapamil (Calan, Covera-HS, Verelan, in Tarka). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
tell your doctor if you have or have ever had asthma or other breathing problems, a slow or irregular heartbeat, or liver disease. Your doctor may tell you not to take carvedilol.
tell your doctor if you have or have ever had problems with blood flow in your feet or legs, diabetes or any other condition that causes you to have low blood sugar, hyperthyroidism (condition in which there is too much thyroid hormone in the body), low blood pressure, Prinzmetal's angina (chest pain that comes at rest with no obvious cause), or pheochromocytoma (a tumor that develops on a gland near the kidneys and may cause high blood pressure and fast heartbeat). Also tell your doctor if you have ever had a serious allergic reaction to a food or any other substance.
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking carvedilol, call your doctor.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking carvedilol.
you should know that this medication may make you feel tired, dizzy, or lightheaded, especially when you start taking carvedilol and when your dose is increased. Do not drive a car or operate machinery until you know how this medication affects you. Be especially careful during the first hour after you take the medication.
do not drink any alcoholic drinks or take any prescription or nonprescription medications that contain alcohol for 2 hours before and 2 hours after you take carvedilol extended-release capsules. Ask your doctor or pharmacist if you do not know if a medication that you plan to take contains alcohol.
you should know that carvedilol may cause dizziness, lightheadedness, and fainting, especially when you get up too quickly from a lying position. This is more common when you first start taking carvedilol. To avoid this problem, get out of bed slowly, resting your feet on the floor for a few minutes before standing up.
if you wear contact lenses, your eyes may become dry during your treatment with carvedilol. Tell your doctor if this becomes bothersome.