Doctor insights on:
Beta Blockers And Public Speaking
Are beta blockers & calcium channel blockers truly contradicted in Wolff-Parkinson-White patients?
Do any beta blockers act on Central Nervous System? Labetalol, Propranalol? What about Alpha-1 blockers?
Yes, most of them: Beta blockers are either water soluble or lipid soluble. The latter cross the blood-brain barrier and act on the CNS (central nervous system). Atenelol and Naldolol are 2 water soluble ones that do not readily cross into the brain. Alpha blockers generally do act on the CNS, and the 2 most common side effects are hypotension and dizziness. ...Read more
Is Cardura (doxazosin) a reasonable second BP drug with Lisinopril when CCBs, diuretics, beta blockers are not well tolerated? Also on B-agonists for asthma.
Yes, it is an option: Cardura (doxazosin) or another alpha blocker type drug is an option when the other classes of drugs mentioned are not well tolerated. Alpha blockers can cause dizziness so they are best taken at night to minimize this effect. The dose needs to be increased slowly. Make sure you are exercising and minimizing salt, alcohol and caffeine as well. ...Read more
Not the first choice: According to the newest JNC guidelines, beta blockers are not the first choice for treating hypertension. If you have conditions like portal hypertension, panic disorder, or chronic migraine headache along with hypertension, then the doctor may choose propanolol to treat two conditions with just one medicine. ...Read moreSee 1 more doctor answer
Are these drugs used to reduce cardiac output: calcium channel blockers and beta (receptor) blockers?
Reverses Ht Failure: Toprol xl (specifically that formulation, not metoprolol tartrate) and Carvedilol (generic or Coreg (carvedilol) brand name) have been shown in large, well controlled clinical trials to slow and sometimes reverse the damage of heart failure. They operate by blocking a malfunctioning feedback loop of hormones and signaling molecules, ultimately by blocking the effect of adrenaline on the heart. Good question! ...Read more
No/Yes: Beta blockers do not help symptoms of anxiety. Sometimes they will blunt the effect stress may have on your heart by blocking the same receptors that 'adrenaline-like' hormones work on. There has been many years of use to prevent migraines, particularly with propanolol which is an older generation of beta blockers. They have been known to reduce migraines. ...Read more
Can beta blockers such as propranolol or toprol (metoprolol) help prevent ventricular fibrillation in susceptible individuals?
Are beta blockers alone effective in vasodilation around the heart or is combination therapy neccessary, i.e. ace-inhibitors, calcium blockers, etc?
BB not vasodilators: The medicines you mention act in three different ways and depending in what you are trying to achieve they can be used separately or together for a variety of conditions, from hypertension to even heart failure (although cal antagonists not recommended for the latter). But beta blockers are not vasodilators ...Read moreSee 1 more doctor answer
Is cilindipine 5 mg a calcium channel blocker or beta blocker.
Does it have any effect on lowering heart rate?
Calcium blocker: Calcium channel blockers are often used for the management of hypertension in pregnancy. Beta blockers are classified as pregnancy category c, meaning that they have not been systematically studied. Although both classes of medications are used in pregnancy, calcium channel blockers are likely to be safer. ...Read moreSee 1 more doctor answer
Anxiety: Each have their benefits but Lexapro (escitalopram) is used primarily for anxiety and depression. Beta blockers have multiple functions, anxiety being one. It looks like your physician in trying multiple medications to give you more help throughout the day and treat on multiple fronts (which is a good idea). ...Read more
Is nadolol (corgard) as effective as propranolol (inderal, innopran xl) in treating social anxiety?
NO: In theory, the answer is no because it doesn't cross the blood brain barrier as readily as propranolol. Nonetheless, it does block the catecholamine (adrenalin) response to stress/anxiety so it will still help and we all respond in our own unique way to every medicine so it may be excellent for some people. ...Read more
Beta Blocket: Regarding potency and effectiveness of beta blocking agents, after propranolol, my choice would be atenolol. Atenolol is equally effective across all indications as propranolol. Two added advantages of atenolol are its long half life which allows for most patients to be treated with once daily dosing. Its .Water solubility, does not allow CNS entry, thus markedly reducing CNS adverse effects. ...Read more
Is someone on beta blockers protected from caffeine's theoretical arrhythmogenic effects? In other words, can coffee be drunk with beta blockers?
Coffee: A recent study found that one or two cups of coffee a day had no significant arrhythmogenic effects. ...Read more
Does an adrenaline surge (from anxiety or exercise) when taking a non-selective B-blocker cause coronary vasoconstriction? Selective B1-blckr better?
Beta blockers: B blockers are used to treat angina caused by coronary disease, and they are effective. They reduce heart rate and the workload of the heart, including response to exercise. With very high norepinephrine conditions, eg. pheochromocytoma, blocking beta can cause unopposed alpha and raise BP. But that is a very rare condition. ...Read more
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