This medicine is a beta-adrenergic blocking agent (beta-blocker) used to treat high blood pressure, alone or with other medicines. It is also used for the long-term treatment of chest pain and to treat certain types of heart failure. It may also be used for other conditions as determined by your doctor.
Follow the directions for taking this medicine provided by your doctor. TAKE THIS MEDICINE BY MOUTH EITHER ALWAYS WITH FOOD OR IMMEDIATELY FOLLOWING A MEAL, at the same time each day. THIS MEDICINE may be broken in half. Swallow the tablets or half tablets whole. Do not crush or chew before swallowing. STORE THIS MEDICINE at room temperature, between 68 and 77 degrees F (20 and 25 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. IF YOU MISS A DOSE OF THIS MEDICINE, take it if you remember the same day. If you do not remember until the next day, skip the missed dose. Do not take 2 doses at once. If you miss more than one dose, check with your doctor or pharmacist.
WARNING: Do not suddenly stop taking this medicine; sharp chest pain, irregular heartbeat, and sometimes heart attack may occur. The risk may be greater if you have certain types of heart disease. Your doctor should slowly lower your dose over several weeks if you need to stop taking it, even if you only take it for high blood pressure. Heart disease is common and you may not know you have it. Limit physical activity while you are lowering your dose. If new or worsened chest pain or other heart problems occur, contact your doctor right away. You may need to start taking this medicine again. TELL YOUR DOCTOR OR DENTIST that you take this medicine before you receive any medical or dental care, emergency care, or surgery. TELL YOUR DOCTOR if you have a history of diabetes or take medicine to lower your blood sugar (eg, glyburide, insulin). This medicine may hide signs of low blood sugar such as fast heartbeat. Tell your doctor right away if you notice other signs of low blood sugar such as anxiety, chills, dizziness, drowsiness, fainting, headache, tremor, unusual sweating, vision changes, or weakness. THIS MEDICINE SHOULD NOT USUALLY BE USED by patients who have a history of certain lung or breathing problems (eg, asthma) or a certain type of adrenal gland tumor (pheochromocytoma). It may worsen these conditions. Tell your doctor if you have a history of these conditions; your doctor may need to adjust your dose or prescribe additional medicine to reduce the risk of side effects. TELL YOUR DOCTOR if you have a history of overactive thyroid. This medicine may hide symptoms of overactive thyroid (eg, fast heartbeat). Do not suddenly stop taking this medicine; suddenly stopping this medicine could worsen your condition. Your doctor should slowly lower your dose over several weeks if you need to stop taking it. Check with your doctor for more information. Some medicines or medical conditions may interact with this medicine. INFORM YOUR DOCTOR OR PHARMACIST of all prescription and over-the-counter medicine that you are taking. DO NOT TAKE THIS MEDICINE IF you are taking mibefradil. ADDITIONAL MONITORING OF YOUR DOSE OR CONDITION may be needed if you are taking amiodarone, bupropion, certain HIV protease inhibitors (eg, ritonavir), certain selective serotonin reuptake inhibitors (SSRIs) (eg, fluoxetine, paroxetine), cimetidine, digoxin, diphenhydramine, disopyramide, flecainide, hormonal contraceptives (eg, birth control pills), hydralazine, hydroxychloroquine, ketanserin, mefloquine, phenothiazines (eg, thioridazine), propafenone, quinazolines (eg, imatinib), quinidine, terbinafine, propylthiouracil, verapamil, barbiturates (eg, phenobarbital), indomethacin, phenylpropanolamine, bupivacaine, disopyramide, flecainide, hydralazine, ketanserin, lidocaine, or clonidine. DO NOT START OR STOP any medicine without doctor or pharmacist approval. Inform your doctor of any other medical conditions including lung or breathing problems (eg, asthma, bronchitis, chronic obstructive pulmonary disease / COPD), diabetes, low blood pressure, thyroid problems, or adrenal gland tumor (pheochromocytoma). Tell your doctor if you have a history of heart attack, slow or irregular heartbeat, heart failure, or other heart problems; chest pain or angina; blood vessel or circulation problems; liver disease; or if you will be having surgery or receiving anesthesia. USE OF THIS MEDICINE IS NOT RECOMMENDED if you have a very slow heartbeat (eg, bradycardia), certain types of irregular heartbeat (eg, atrioventricular / AV block, sick sinus syndrome), moderate to severe heart failure, very low systolic blood pressure (less than 100 mm Hg), severe blood circulation problems, or if you are unable to urinate. This medicine should not be used in CHILDREN younger than 6 years old; safety and effectiveness in these children have not been confirmed. Contact your doctor or pharmacist if you have any questions or concerns about using this medicin
SIDE EFFECTS that may occur while taking this medicine include constipation, diarrhea, dizziness, dry mouth/eyes, gas, headache, heartburn, lightheadedness, mild drowsiness, muscle aches, nausea, stomach pain, trouble sleeping, unusual tiredness or weakness, or vomiting. If they continue or are bothersome, check with your doctor. CONTACT YOUR DOCTOR IMMEDIATELY if you experience blue or unusually cold hands or feet; chest pain; fainting; hallucinations; mood or mental changes (eg, confusion, depression); pounding in the chest; severe dizziness or lightheadedness; shortness of breath; slow or irregular heartbeat; swelling of the arms, hands, and feet; vision changes; wheezing; yellowing of the skin or eyes. AN ALLERGIC REACTION to this medicine is unlikely, but seek immediate medical attention if it occurs. Symptoms of an allergic reaction include rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue. If you notice other effects not listed above, contact your doctor, nurse, or pharmacist. This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your healthcare provider. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms may include blue skin discoloration; difficult or slowed breathing; severe dizziness; very slow heart rate; vomiting; unusual weakness.
DO NOT SHARE THIS MEDICINE with others for whom it was not prescribed. DO NOT USE THIS MEDICINE for other health conditions. KEEP THIS MEDICINE out of the reach of children and pets. IF USING THIS MEDICINE FOR AN EXTENDED PERIOD OF TIME, obtain refills before your supply runs out. CHECK WITH YOUR PHARMACIST about how to dispose of unused medicine.