Dihydropyridine (DHP) CCBs tend to be more potent vasodilators than non-dihydropyridine (non-DHP) agents, whereas the latter have more marked negative inotropic effects.

What is the difference in dihydropyridine and non dihydropyridine calcium channel blockers what conditions are they used to treat?

The dihydropyridines are more vascular selective and the non-dihydropyridines are more myocardial selective and tend to reduce the heart rate. Further important differences are between short- and long-acting forms of the calcium channel antagonists.

What is the best calcium channel blocker for hypertension?

The dihydropyridine calcium channel blockers, a group that includes amlodipine, felodipine and lacidipine, are a common choice for treatment of hypertension. Amlodipine, which is both low cost and taken once daily, is the one of the most commonly prescribed agents.

What are non dihydropyridine calcium channel blockers used for?

Non-dihydropyridines — The non-dihydropyridines, including verapamil and diltiazem, are used in the management of hypertension, chronic stable angina, cardiac arrhythmias, or for proteinuria reduction.

Which calcium channel blockers are Nondihydropyridine?

Generic and brand names of nondihydropyridine calcium channel blockers drugs include: Dilatrate. Diltiazem (Cardizem, Cardizem CD, Cardizem LA, Cartia XT, Dilacor, Dilacor XR, Dilt-CD, Diltazem, Diltazem CD, Diltia XT, Diltiaz, Diltiaz CD, Diltiaz SR, Diltiazem CD, Diltiazem SR, Taztia XT, Tiazac) Dilzem.

Is a dihydropyridine CCB known to cause bradycardia?

Dihydropyridines in mild to moderate overdose may cause reflex tachycardia; however, in severe overdose, there may be a loss of receptor selectivity leading to bradycardia.

What is dihydropyridine used for?

Because of their selective effect on arterial blood vessels, dihydropyridines are mainly used to decrease vascular resistance and blood pressure, and therefore are used to treat hypertension. Other uses of dihydropyridines include preventive treatment of stable angina, Raynaud’s syndrome, and cerebral vasospasm.

What are the two types of calcium channel blockers?

There are two distinct chemical classes of CCBs: the dihydropyridines (such as nifedipine and amlodipine) and the nondihydropyridines (diltiazem and verapamil).

Is Amlodipine a non dihydropyridine?

Amlodipine is a dihydropyridine CCB that has antianginal and antihypertensive effects. Amlodipine is a peripheral arterial vasodilator that acts directly on vascular smooth muscle to cause a reduction in peripheral vascular resistance and reduction in blood pressure.

What's the difference between verapamil and diltiazem?

Verapamil has a more profound effect on gut smooth muscle than the other calcium channel antagonists. It reduces gut motility and causes constipation. Like verapamil, diltiazem is an arteriolar dilator which reduces peripheral resistance and thus blood pressure, but it is less cardio depressant.

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Which is better amlodipine or felodipine?

Amlodipine seems to be more effective than felodipine when the drugs are compared in the same dose, with regard to the effect on clinic BP 24 h after dosing and to ambulatory BP during the night. The longer elimination half-life of amlodipine as compared to felodipine is the probable reason for this finding.

Which thiazide is used for hypertension?

Chlorthalidone and indapamide, both thiazide-like diuretics, have been shown to provide greater antihypertensive efficacy and, more importantly, to reduce cardiovascular events and mortality compared with hydrochlorothiazide (a thiazide-type diuretic) [1].

What is the difference between amlodipine and diltiazem?

Thus both amlodipine and diltiazem once-daily are effective in reducing blood pressure. While amlodipine is more potent than diltiazem in reducing systolic blood pressure, it causes more vasodilator side effects.

Which of the following adverse effects may occur due to a dihydropyridine type calcium channel blocker?

Calcium Channel Blockers Dihydropyridine CCBs can cause flushing, headache, excessive hypotension, edema and reflex tachycardia.

What is the difference between verapamil and nifedipine?

Verapamil reduced mean diastolic blood pressure significantly more than nifedipine in all positions and lowered mean systolic pressure slightly more than nifedipine. Resting heart rate was significantly decreased by verapamil and insignificantly altered by nifedipine.

What is the difference between verapamil and amlodipine?

Verapamil is more effective in reducing blood pressure and rate-pressure product responses to stress compared with amlodipine. Although plasma noradrenaline is lower with verapamil at rest and after stress, the increase during stress is not different.

Where are dihydropyridine receptors located?

The DHPR foci are located in longitudinal rows at the intersection of the cell surface with the optical section, and they show a sarcomere-related periodicity (Fig. 1 D, arrowheads).

Which B blockers are Cardioselective?

The cardio-selective beta-1-blockers include atenolol, betaxolol, bisoprolol, esmolol, acebutolol, metoprolol, and nebivolol.

Why is nifedipine no longer used?

Nifedipine, a dihydropyridine calcium channel blocker, was once one of the most widely used medications for hypertension, but safety and tolerability concerns along with the introduction of new classes of antihypertensive medications and an increasing pool of data showing mortality benefit of other classes caused …

Which calcium channel blockers cause bradycardia?

Both beta-adrenergic receptor antagonist drugs (beta-blockers) and non-dihydropyridine calcium-channel blockers (non-DHP CCBs), ie, diltiazem and verapamil, can cause sinus arrest or severe sinus bradycardia, and when drugs from the two classes are used together, these effects may be more than additive.

Can hydralazine cause bradycardia?

It is generally recognized that the vasodilator hydralazine produces hypotension accompanied by baroreflex-mediated tachycardia. In some experimental conditions, however, the accompanying heart rate change is bradycardia, a paradoxical response which has not been satisfactorily explained.

Does nifedipine cause bradycardia?

This is inconsistent with the well-established finding that nifedipine induces tachycardia in normally innervated hearts. However, in hearts deprived of compensatory sympathetic drive, it may lead to bradycardia.

What is the mode of action of Cilnidipine?

Cilnidipine decreases blood pressure and is used to treat hypertension and its comorbidities. Due to its blocking action at the N-type and L-type calcium channel, cilnidipine dilates both arterioles and venules, reducing the pressure in the capillary bed.

Is nifedipine a Nondihydropyridine?

Dihydropyridine CCBs (nifedipine and amlodipine) primarily act on vascular smooth muscles. Nondihydropyridine CCBs (verapamil > diltiazem) primarily act on the heart.

Why is amlodipine preferred over nifedipine?

Nifedipine is an effective compound for the treatment of hypertension. However, even as a tablet formulation it is relatively short acting requiring two or three times daily administration. Amlodipine is a long-acting calcium antagonist and effectively lowers BP in patients with essential hypertension.

Which of the following is classified as a calcium channel blocker?

Examples of calcium channel blockers include: Amlodipine (Norvasc) Diltiazem (Cardizem, Tiazac, others) Felodipine.

Are all calcium channel blockers the same?

There are two different types of calcium channel blockers, which are called dihydropyridines and nondihydropyridines.

What is bisoprolol used for?

Bisoprolol is used alone or together with other medicines to treat high blood pressure (hypertension). High blood pressure adds to the workload of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly.

Are verapamil and Cardizem the same?

Cardizem (diltiazem hydrochloride) and Verelan (verapamil hydrochloride) are calcium channel blockers used for different purposes. Cardizem is used to prevent chest pain (angina). Cardizem may help to increase your ability to exercise and decrease how often you may get angina attacks.

What is the difference between diltiazem and nifedipine?

Both diltiazem and nifedipine provide effective antianginal therapy for coronary spasm, but diltiazem has fewer side effects. The combination of these drugs is associated with frequent side effects but helps some patients who remain symptomatic despite maximal tolerated doses of a single drug.

Is verapamil similar to diltiazem?

Conclusion: Intravenous diltiazem and verapamil are comparable in terms of efficacy and effect on systolic function in patients with rapid atrial fibrillation and flutter. However, hypotension may limit therapy with verapamil in some patients.