Beta blockers (sometimes written as β-blockers) are a class of drugs used for various indications, but particularly for the management of hypertension and cardiac arrhythmias. Beta blockers may also be referred to as beta-adrenergic blocking agents, beta-adrenergic antagonists, or beta antagonists.

Pharmacology

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Beta blockers block the action of endogenous catecholamines, epinephrine (adrenaline) and norepinephrine (noradrenaline) in particular, on β-adrenergic receptors, part of the sympathetic nervous system which mediates the "fight or flight" response.

There are three known types of beta receptor, designated β₁, β₂ and β₃. β₁-Adrenergic receptors are located mainly in the heart, kidney, and adipose tissue. β₂-Adrenergic receptors are located mainly in the heart, lung, GI tract, liver, pancreas, and skeletal muscle. The role and location of β₃-receptors is less well-defined.

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@Cosky Then please take the study with a grain of salt. Beta blockers and asthma/COPD have a long/ bad history
rtcave (Rick Frea) Wed, 16 Dec 2009 02:47:24 -0000
@Cosky Then please take the study with a grain of salt. Beta blockers and asthma/COPD have a long/ bad history
Contraindications to Beta Blockers Linked to Deaths: http://bit.ly/4M6L2U #health
AH_HealthNews (AH_HealthNews) Wed, 16 Dec 2009 01:44:06 -0000
Contraindications to Beta Blockers Linked to Deaths: http://bit.ly/4M6L2U #health
ACC, AHA Update Guidelines for Beta Blockers - The use of beta blockers in patients undergoing noncardiac surgeries... http://ow.ly/16a0oU
aafp (AAFP) Tue, 15 Dec 2009 23:52:06 -0000
ACC, AHA Update Guidelines for Beta Blockers - The use of beta blockers in patients undergoing noncardiac surgeries... http://ow.ly/16a0oU
@seismicshed beta blockers?
stewchambers (Stewart Chambers) Tue, 15 Dec 2009 16:24:11 -0000
@seismicshed beta blockers?
Mix-up with the doctor's appt today- broke down in the surgery and got an emergency appt :s Now on beta-blockers, so glad to have hope!
EvilAlterEgo (Kirsten Rose) Tue, 15 Dec 2009 16:17:03 -0000
Mix-up with the doctor's appt today- broke down in the surgery and got an emergency appt :s Now on beta-blockers, so glad to have hope!
New Indication for Procoralan(R): Use in Combination With Beta Blockers for Chronic Stable Angina Patients: The.. http://bit.ly/7xi4f0
belgamedia (belgamedia) Tue, 15 Dec 2009 12:38:00 -0000
New Indication for Procoralan(R): Use in Combination With Beta Blockers for Chronic Stable Angina Patients: The.. http://bit.ly/7xi4f0

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