Nebivolol

Bystolic therapy is also associated with warnings regarding abrupt cessation of therapy, cardiac failure, angina and acute myocardial infarction, bronchospastic diseases, anesthesia and major surgery, diabetes and hypoglycemia, thyrotoxicosis, peripheral vascular disease, non-dihydropyridine calcium channel blockers

Cardioselective Beta-blocker

Nebivolol is a β adrenergic receptor blocking agent. Nebivolol inhibits both β1 and β1 adrenergic receptors. Nebivolol lacks intrinsic sympathomimetic and membrane stabilizing activity at therapeutically relevant concentrations. At clinically relevant doses, Nebivolol does not demonstrate β1-adrenergic receptor blockade activity. Various metabolites, including glucuronides, contribute to beta-blocking activity. Mode of Action of Nebivolol involved include: decreased heart rate decreased myocardia contractility diminution of tonic sympathetic outflow to the periphery from cerebral vasomotor centers suppression of renin activity and vasodilation and decreased peripheral vascular resistance Pharmacokinetics: Nebivolol is metabolized by a number of routes, including glucuronidation and hydroxylation by CYP2D6. The active isomer (d-nebivolol) has an effective half-life of about 12 hours in CYP2D6 extensive metabolizers (most people), and 19 hours in poor metabolizers and exposure to d-nebivolol is substantially increased in poor metabolizers. This has less importance than usual, however, because the metabolites, including the hydroxyl metabolite and glucuronides (the predominant circulating metabolites), contribute to b blocking activity. Absorption and Distribution: Absorption of Nebivolol is similar to an oral solution. Mean peak plasma nebivolol concentrations occur approximately 1.5 to 4 hours post-dosing in EMs and PMs. Food does not alter the pharmacokinetics of nebivolol. Nebivolol may be administered without regard to meals. The in vitro human plasma protein binding of nebivolol is approximately 98%, mostly to albumin, and is independent of nebivolol concentrations. Metabolism and Excretion: Nebivolol is predominantly metabolized via direct glucuronidation of parent and to a lesser extent via N-dealkylation and oxidation via cytochrome P450 2D6. After a single oral administration of 14C-nebivolol, 38% of the dose was recovered in urine and 44% in feces for EMs and 67% in urine and 13% in feces for PMs. Digoxin: Concomitant administration of Nebivolol (10 mg once daily) and digoxin (0.25 mg once daily) for 10 days in 14 healthy adult individuals resulted in no significant changes in the pharmacokinetics of digoxin or nebivolol. Warfarin: Administration of Nebivolol (10 mg once daily for 10 days) led to no significant changes in the pharmacokinetics of nebivolol or R- or S-warfarin following a single 10 mg dose of warfarin. Similarly, nebivolol has no significant effects on the anticoagulant activity of warfarin, as assessed by Prothrombin time and INR profiles from 0 to 144 hours after a single 10 mg warfarin dose in 12 healthy adult volunteers. The starting dose should be reduced in patients with moderate hepatic impairment. No formal studies have been performed in patients with severe hepatic impairment and nebivolol should be contraindicated for these patients.

Adult: 5 mg daily. May increase dose at intervals of 2 wk to a max of 40 mg once daily, if needed. Elderly: >65 yr: Initially, 2.5 mg daily.

Nebivolol should be used with care when myocardial depressants or inhibitors of AV conduction, such as certain calcium antagonists (particularly of the phenylalkylamine [verapamil] and benzothiazepine [diltiazem] classes), or antiarrhythmic agents, such as disopyramide, are used concurrently. Both digitalis glycosides and β-blockers slow atrioventricular conduction and decrease heart rate. Concomitant use can increase the risk of bradycardia. Nebivolol should not be combined with other β-blockers. Patients receiving catecholamine-depleting drugs, such as reserpine or guanethidine, should be closely monitored, because the added β-blocking action of Nebivolol may produce excessive reduction of sympathetic activity. In patients who are receiving Nebivolol and clonidine, Nebivolol should be discontinued for several days before the gradual tapering of clonidine. CYP2D6 Inhibitors: Use caution when Nebivolol is co-administered with CYP2D6 inhibitors (quinidine, propafenone, fluoxetine, paroxetine, etc.)

Nebivolol is contraindicated in the following conditions: severe bradycardia, heart block greater than first degree, patients with cardiogenic shock, decompensated cardiac failure, sick sinus syndrome, patients with severe hepatic impairment, patients who are hypersensitive to any component of this product.

The most common side effects are headache, nausea & bradycardia.

β-blockers may cause intra-uterine growth restriction, neonatal hypoglycaemia, & bradycardia; the risk is greater in severe hypertension. If beta-blockers are used close to delivery, infants should be monitored for signs of β-blockade. Nebivolol is advised to avoid during breast-feeding due to possible risk of toxicity due to β-blockade.

Keep below 30°C temperature, away from light & moisture. Keep out of the reach of children.

P⊗ L⊗ Food *