What's the difference between beta blockers and ARBs?
- Beta blockers and ARBs are used to treat high blood pressure and heart failure.
- Examples of beta blockers include acebutolol (Sectral), atenolol (Tenormin), betaxolol (Kerlone, Betoptic S), bisoprolol fumarate (Zebeta), carvedilol (Coreg), esmolol (Brevibloc), metoprolol (Lopressor, Toprol XL), nadolol (Corgard), nebivolol (Bystolic), penbutolol (Levatol), propranolol (Hemangeol, Inderal LA, Inderal XL, InnoPran XL), sotalol (Betapace, Sorine), and timolol ophthalmic (Timoptic, Betimol, Istalol).
- Examples of ARBs include azilsartan (Edarbi), candesartan (Atacand), eprosartan (Teveten), irbesartan (Avapro), telmisartan (Micardis), valsartan (Diovan), losartan (Cozaar), and olmesartan (Benicar).
- Side effects of beta blockers and ARBs that are similar include rash, diarrhea, and fatigue.
- Side effects of beta blockers that are different from ARBs include nausea, stomach cramps, vomiting, blurred vision, disorientation, insomnia, hair loss, weakness, muscle cramps, and sexual dysfunction.
- Side effects of ARBs that are different from beta blockers include cough, high blood potassium (hyperkalemia), low blood pressure, dizziness, headache, drowsiness, metallic or salty taste in the mouth, orthostatic hypotension (low blood pressure upon standing), indigestion, and upper respiratory tract infection.
- Sudden withdrawal from beta blockers may worsen angina (chest pain) and cause heart attacks, serious abnormal heart rhythms, or sudden death.
What are beta blockers and ARBs?
Beta blockers, or beta-adrenergic blocking agents, block the neurotransmitters norepinephrine and epinephrine (adrenaline) from binding to beta-receptors on nerves. This helps dilate blood vessels, which results in a reduction of heart rate and blood pressure.
- Beta blockers are used to treat high blood pressure, angina (chest pain), heart failure, abnormal heart rhythms, tremors, pheochromocytoma, migraine headache prevention, hypertrophic subaortic stenosis, hyperthyroidism, panic disorder, anxiety, akathisia (restlessness or inability to sit still), eye pressure caused by glaucoma, and aggressive behavior.
- Beta blockers are also used to prevent future heart attacks and death after a heart attack.
Angiotensin II receptor blockers (ARBs) block the action of angiotensin II by preventing it from binding to receptors on the muscles surrounding blood vessels. Angiotensin II causes muscles surrounding blood vessels to contract, which increases pressure within the vessels and can cause high blood pressure (hypertension).
- When angiotensin II can’t bind to receptors, blood vessels enlarge (dilate) and blood pressure is reduced, making it easier for the heart to pump blood.
- ARBs are used to treat high blood pressure and heart failure, and to prevent kidney failure in people with diabetes or high blood pressure.
- ARBs are also used in patients with high blood pressure and an enlarged heart to prevent diabetes and reduce the risk of stroke.
- ARBs also may prevent atrial fibrillation from recurring.
What are the side effects of beta blockers vs. ARBs?
Beta blocker side effects
Beta blockers may cause:
Other important side effects include:
As an extension of their beneficial effect, they slow heart rate and reduce blood pressure, but they may cause adverse effects such as heart failure or heart block in patients with heart problems.
Central nervous system effects of beta blockers include:
Beta blockers that block β2 receptors may cause shortness of breath in asthmatics.
- Raynaud's phenomenon
- Lupus erythematosus
- Serious allergic reactions
- Erythema multiform
- Steven Johnson Syndrome
- Toxic epidermal necrolysis
ARB side effects
ARBs are well tolerated by most individuals. The most common side effects are
- elevated potassium levels in the blood (hyperkalemia),
- low blood pressure,
- abnormal taste sensation (metallic or salty taste),
- orthostatic hypotension (low blood pressure upon standing),
- indigestion, and
- upper respiratory tract infection.
The most serious, but rare, side effects are
- kidney failure,
- liver failure (hepatitis),
- serious allergic reactions,
- a decrease in white blood cells,
- a decrease in blood platelets, and
- swelling of tissues (angioedema).
There have been reports of rhabdomyolysis (destruction of skeletal muscle) in patients receiving ARBs.
Individuals who have narrowing of both arteries that supply the kidneys or have had a severe reaction to ARBs should avoid them.
Like other antihypertensives, ARBs have been associated with sexual dysfunction.
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What drugs interact with beta blockers and ARBs?
Beta blocker drug interactions
- Combining propranolol (Inderal) or pindolol (Visken) with thioridazine (Mellaril) or chlorpromazine (Thorazine) may result in low blood pressure (hypotension) and abnormal heart rhythms because the drugs interfere with each other's elimination and result in increased levels of the drugs.
- Dangerous elevations in blood pressure may occur when clonidine (Catapres) is combined with a beta blocker, or when clonidine or beta blocker is discontinued after their concurrent use. Blood pressure should be closely monitored after initiation or discontinuation of clonidine or a beta blocker when they have been used together.
- Phenobarbital and similar agents may increase the breakdown and reduce blood levels of propanolol (Inderal) or metoprolol (Lopressor, Toprol XL). This may reduce effectiveness of the beta blocker.
- Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) (for example, ibuprofen) may counteract the blood pressure reducing effects of beta blockers by reducing the effects of prostaglandins, which play a role in control of blood pressure.
- Beta blockers may prolong hypoglycemia (low blood sugar) and mask symptoms of hypoglycemia in diabetics who are taking insulin or other diabetic medications.
ARB drug interactions
- ARBs have few interactions with other drugs.
- Since ARBs may increase blood levels of potassium, the use of potassium supplements, salt substitutes (which often contain potassium), or other drugs that increase potassium may result in excessive blood potassium levels and cardiac arrhythmias.
- ARBs may also increase the blood concentration of lithium (Eskalith, Lithobid) and lead to an increase in side effects from lithium.
- Rifampin (Rifadin) reduces the blood levels of losartan, and fluconazole (Diflucan) reduces the conversion of losartan to its active form. These effects could decrease the effects of losartan.
- ARBs should not be combined with ACE inhibitors because such combinations increase the risk of hypotension, hyperkalemia, and renal impairment.
- ARBs should not be combined with aliskiren (Tekturna) because such combinations increase the risk of kidney failure, excessive low blood pressure, and hyperkalemia.
What are the different types of beta blockers and ARBs?
Examples of beta blockers
- acebutolol (Sectral)
- atenolol (Tenormin)
- betaxolol (Kerlone)
- betaxolol (Betoptic S)
- bisoprolol fumarate (Zebeta)
- carteolol (Cartrol, discontinued)
- carvedilol (Coreg)
- esmolol (Brevibloc)
- labetalol (Trandate [Normodyne - discontinued])
- metoprolol (Lopressor, Toprol XL)
- nadolol (Corgard)
- nebivolol (Bystolic)
- penbutolol (Levatol)
- pindolol (Visken, discontinued)
- propranolol (Hemangeol, Inderal LA, Inderal XL, InnoPran XL)
- sotalol (Betapace, Sorine)
- timolol (Blocadren, discontinued)
- timolol ophthalmic solution (Timoptic, Betimol, Istalol)
Examples of ARBs
The following is a list of currently available ARBs:
Both beta blockers, or beta adrenergic blocking agents, and angiotensin II receptor blockers (ARBs) both cause blood vessels to dilate through different actions on the nervous system. Beta blockers and ARBs are used to treat high blood pressure and heart failure.
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What Is the Normal Blood Pressure Range?
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How to Lower My Blood Pressure Immediately
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Isolated diastolic hypertension (IDH) occurs when your systolic blood pressure is normal, and only your diastolic blood pressure is high (over 80 mm Hg). Causes of high diastolic blood pressure include a high-sodium diet, obesity, lack of physical activity, excessive alcohol consumption, stress and anxiety.
Congestive Heart Failure (CHF)
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High blood pressure (hypertension) is a disease in which pressure within the arteries of the body is elevated. About 75 million people in the US have hypertension (1 in 3 adults), and only half of them are able to manage it. Many people do not know that they have high blood pressure because it often has no has no warning signs or symptoms. Systolic and diastolic are the two readings in which blood pressure is measured. The American College of Cardiology released new guidelines for high blood pressure in 2017. The guidelines now state that blood normal blood pressure is 120/80 mmHg. If either one of those numbers is higher, you have high blood pressure. The American Academy of Cardiology defines high blood pressure slightly differently. The AAC considers 130/80 mm Hg. or greater (either number) stage 1 hypertension. Stage 2 hypertension is considered 140/90 mm Hg. or greater. If you have high blood pressure you are at risk of developing life threatening diseases like stroke and heart attack.REFERENCE: CDC. High Blood Pressure. Updated: Nov 13, 2017.
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Medications & Supplements
- High Blood Pressure Drugs (Hypertension)
- carvedilol - oral, Coreg
- atenolol - oral, Tenormin
- metoprolol/hydrochlorothiazide - oral, Lopressor HCT
- metoprolol - oral, Lopressor
- valsartan - oral, Diovan
- metoprolol extended-release - oral, Toprol XL
- telmisartan - oral, Micardis
- losartan - oral, Cozaar
- irbesartan - oral, Avapro
- betaxolol suspension - ophthalmic, Betoptic S
- candesartan - oral, Atacand
- losartan/hydrochlorothiazide - oral, Hyzaar
- METOPROLOL EXTENDED RELEASE-ORAL
- carvedilol (Coreg)
- metoprolol (Lopressor, Toprol XL)
- losartan (Cozaar)
- valsartan, Diovan
- telmisartan, Micardis
- Coreg vs. Metoprolol Tartrate
- losartan and hydrochlorothiazide (Hyzaar)
- candesartan cilexetil, Atacand
- irbesartan (Avapro)
- Entresto (sacubitril and valsartan)
- valsartan/hydrochlorothiazide (Diovan HCT)
- nadolol (Corgard)
- Sectral (acebutolol)
- amlodipine and valsartan (Exforge)
- atenolol and chlorthalidone, Tenoretic
- betaxolol, Kerlone (Discontinued Brand)
- betaxolol ophthalmic (Betoptic S, Betoptic)
- irbesartan/hydrochlorothiazide - oral, Avalide
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