Sympathomimetics

Sympathomimetics are a class of drugs that mimic the effects of substances released by the sympathetic nervous system. These substances, such as norepinephrine and epinephrine, are responsible for the body's "fight or flight" response. Sympathomimetics are used in a variety of medical treatments, including for asthma, cardiac arrest, and hypotension.

Mechanism of Action

Sympathomimetics work by stimulating the receptors of the sympathetic nervous system. These receptors, known as adrenergic receptors, are found in various parts of the body, including the heart, lungs, and blood vessels. When these receptors are activated, they trigger a series of physiological responses, such as increased heart rate, bronchodilation, and vasoconstriction.

Uses

Sympathomimetics are used in a variety of medical treatments. They can be used to treat asthma by causing bronchodilation, which opens up the airways and makes it easier to breathe. They can also be used to treat cardiac arrest by increasing the heart rate and force of contraction. In addition, sympathomimetics can be used to treat hypotension by causing vasoconstriction, which increases blood pressure.

Side Effects

Like all drugs, sympathomimetics can have side effects. These can include tachycardia, hypertension, and anxiety. In rare cases, sympathomimetics can cause severe side effects, such as cardiac arrhythmias and myocardial infarction.

See Also

• Adrenergic receptor
• Sympathetic nervous system
• Norepinephrine
• Epinephrine

Sympathomimetics Resources
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