Antianginal drugs
Although angina’s cardinal symptom is chest pain,
the drugs used to treat angina aren’t typically analgesics.
Instead, antianginal
drugs treat angina by reducing myocar-dial oxygen demand (reducing the
amount of oxygen the heart needs to do its work), by increasing the supply of
oxygen to the heart, or both. (See How
antianginal drugs work.)
The three classes of antianginal drugs discussed in
this section include:
§ nitrates (for treating acute angina)
·
beta-adrenergic blockers (for long-term prevention of angina)
·
calcium channel blockers (used when other drugs fail to pre-vent
angina).
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