Adrenaline 
Adverse Effect: Hypertension, bradycardia, resistance to Adrenaline in anaphylaxis     Clinical Management: Concurrent use should be avoided if possible. However, if used concurrently, monitor blood pressure carefully. If Carvedilol causes resistance to Adrenaline in anaphylactic shock, glucagon may be effective in a dose of 1 mg or more intravenously every five minutes. 
Amiodarone 
Adverse Effect: hypotension, bradycardia, or cardiac arrest     Clinical Management: Monitor cardiac function carefully. Amiodarone should be used with caution in patients receiving beta blockers particularly if there is suspicion of underlying dysfunction of the sinus node, such as bradycardia or sick sinus syndrome, or if there is partial AV block. 
Amlodipine 
Adverse Effect: hypotension and/or bradycardia     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure. 
Benidipine 
Adverse Effect: hypotension and/or bradycardia     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure. 
Celecoxib 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Chlorpropamide 
Adverse Effect: Hypoglycemia, hyperglycemia, or hypertension     Clinical Management: If the use of a beta blocker is required in a diabetic, watch for decreased diabetic control by monitoring the patients glucose carefully. Cardioselective beta blockers (atenolol, metoprolol) cause less disturbance of glucose metabolism and less masking of hypoglycemic effects. Propranolol accounts for the majority of positive reports of an interaction and should clearly be avoided. 
Cimetidine 
Adverse Effect: increased adverse effects of carvedilol (dizziness, insomnia, GI symptoms, postural hypotension)     Clinical Management: Monitor patient response (blood pressure, pulse rate) to carvedilol when used concomitantly with cimetidine. Adjust carvedilol dosage as needed. 
Clonidine 
Adverse Effect: exaggerated clonidine withdrawal response (acute hypertension)     Clinical Management: Patients to be withdrawn from clonidine who are concomitantly receiving a beta blocking agent should be monitored carefully for hypertension. Withdraw the beta blocker several days before a gradual lowering of clonidine doses. Alternatively, substitute labetalol (an alpha/beta blocker) for clonidine. 
Digoxin 
Adverse Effect: AV block and possible digoxin toxicity     Clinical Management: When beta blockers and digoxin are to be given concomitantly, carefully monitor ECG and digoxin serum concentrations. Adjust doses accordingly. 
Diltiazem 
Adverse Effect: Hypotension, bradycardia, AV conduction disturbances   Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure. A dosage adjustment for hepatically metabolized beta blockers may be required. 
Felodipine 
Adverse Effect: hypotension and/or bradycardia     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure. 
Flunarizine 
Adverse Effect: Hypotension, bradycardia, and AV conduction disturbances     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure or bradyarrhythmias. 
Flurbiprofen 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Glibenclamide 
Adverse Effect: Hypoglycemia, hyperglycemia, or hypertension     Clinical Management: If the use of a beta blocker is required in a diabetic, watch for decreased diabetic control by monitoring the patients glucose carefully. Cardioselective beta blockers (atenolol, metoprolol) cause less disturbance of glucose metabolism and less masking of hypoglycemic effects. Propranolol accounts for the majority of positive reports of an interaction and should clearly be avoided. 
Gliclazide 
Adverse Effect: Hypoglycemia, hyperglycemia, or hypertension     Clinical Management: If the use of a beta blocker is required in a diabetic, watch for decreased diabetic control by monitoring the patients glucose carefully. Cardioselective beta blockers (atenolol, metoprolol) cause less disturbance of glucose metabolism and less masking of hypoglycemic effects. Propranolol accounts for the majority of positive reports of an interaction and should clearly be avoided. 
Glimepiride 
Adverse Effect: Hypoglycemia, hyperglycemia, or hypertension     Clinical Management: If the use of a beta blocker is required in a diabetic, watch for decreased diabetic control by monitoring the patients glucose carefully. Cardioselective beta blockers (atenolol, metoprolol) cause less disturbance of glucose metabolism and less masking of hypoglycemic effects. Propranolol accounts for the majority of positive reports of an interaction and should clearly be avoided. 
Glipizide 
Adverse Effect: Hypoglycemia, hyperglycemia, or hypertension     Clinical Management: If the use of a beta blocker is required in a diabetic, watch for decreased diabetic control by monitoring the patients glucose carefully. Cardioselective beta blockers (atenolol, metoprolol) cause less disturbance of glucose metabolism and less masking of hypoglycemic effects. Propranolol accounts for the majority of positive reports of an interaction and should clearly be avoided. 
Ibuprofen 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Indomethacin 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Ketoprofen 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Ketorolac 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Lacidipine 
Adverse Effect: hypotension and/or bradycardia     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure. 
Lidoflazine 
Adverse Effect: Hypotension, bradycardia, and AV conduction disturbances     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure or bradyarrhythmias. 
Mefenamic Acid 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Meloxicam 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Metformin 
Adverse Effect: Hypoglycemia, hyperglycemia, or hypertension     Clinical Management: If the use of a beta blocker is required in a diabetic, watch for decreased diabetic control by monitoring the patients glucose carefully. Cardioselective beta blockers (atenolol, metoprolol) cause less disturbance of glucose metabolism and less masking of hypoglycemic effects. Propranolol accounts for the majority of positive reports of an interaction and should clearly be avoided. 
Methyldopa 
Adverse Effect: Exaggerated hypertensive response, tachycardia, or arrhythmias during physiologic stress or exposure to exogenous catecholamines     Clinical Management: Monitor blood pressure carefully during concurrent therapy, especially during excessive physiologic stress or use of exogenous catecholamines such as phenylpropanolamine. 
Nabumetone 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Naproxen 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Nifedipine 
Adverse Effect: hypotension and/or bradycardia     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure. 
Nimesulide 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Nitrendipine 
Adverse Effect: hypotension and/or bradycardia     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure. 
Oxyphenbutazone 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Paracetamol 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Phenacetin 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Phenformin 
Adverse Effect: Hypoglycemia, hyperglycemia, or hypertension     Clinical Management: If the use of a beta blocker is required in a diabetic, watch for decreased diabetic control by monitoring the patients glucose carefully. Cardioselective beta blockers (atenolol, metoprolol) cause less disturbance of glucose metabolism and less masking of hypoglycemic effects. Propranolol accounts for the majority of positive reports of an interaction and should clearly be avoided. 
Phenylbutazone 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Piroxicam 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Prazosin - BPH 
Adverse Effect: an exaggerated hypotensive response to the first dose of the alpha blocker     Clinical Management: When concurrent therapy with an alpha blocker and a beta blocker is required, initiate the alpha blocker with a smaller than usual dose, preferably at bedtime. Monitor the patient closely for hypotension 
Rifampicin 
Adverse Effect: Decreased therapeutic response to carvedilol     Clinical Management: Monitor patient response (blood pressure, signs/symptoms of hepatic dysfunction) with concomitant use of carvedilol and rifampin. Adjust carvedilol dosage as needed. 
Ritodrine 
Adverse Effect: Potential interference with tocolytic action of ritodrine     Clinical Management: It is possible to successfully treat a patient with both a beta blocker and a beta mimetic if an appropriate dosage is found and the clinical response is monitored. 
Tenoxicam 
Adverse Effect: Decreased antihypertensive effect     Clinical Management: If concurrent therapy is required, monitor the patients blood pressure carefully and assess the need for a dosage adjustment for the beta blocker. 
Terazosin - BPH 
Adverse Effect: an exaggerated hypotensive response to the first dose of the alpha blocker     Clinical Management: When concurrent therapy with an alpha blocker and a beta blocker is required, initiate the alpha blocker with a smaller than usual dose, preferably at bedtime. Monitor the patient closely for hypotension 
Tolbutamide 
Adverse Effect: Hypoglycemia, hyperglycemia, or hypertension     Clinical Management: If the use of a beta blocker is required in a diabetic, watch for decreased diabetic control by monitoring the patients glucose carefully. Cardioselective beta blockers (atenolol, metoprolol) cause less disturbance of glucose metabolism and less masking of hypoglycemic effects. Propranolol accounts for the majority of positive reports of an interaction and should clearly be avoided. 
Verapamil 
Adverse Effect: Hypotension, bradycardia     Clinical Management: If concurrent therapy is required, monitor cardiac function carefully, particularly in patients predisposed to heart failure.  |