Vasoconstrictor

Vasoconstrictor

A vasoconstrictor is a type of drug or natural substance that narrows (constricts) the blood vessels. This reduces the amount of blood that can flow through them, which can help to control blood pressure and reduce swelling.

Mechanism of action

Vasoconstrictors work by stimulating the smooth muscle cells in the walls of blood vessels, causing them to contract. This narrows the diameter of the blood vessels, reducing the amount of blood that can flow through them. The reduced blood flow can help to control blood pressure and reduce swelling.

Uses

Vasoconstrictors are used in a variety of medical situations. They can be used to treat conditions such as hypotension (low blood pressure), shock, and certain types of bleeding. They are also used in some types of surgery to reduce blood loss.

Side effects

Like all drugs, vasoconstrictors can have side effects. These can include headache, nausea, dizziness, and palpitations. In rare cases, they can cause serious side effects such as heart attack or stroke.

Examples

Examples of vasoconstrictors include epinephrine, norepinephrine, and vasopressin. These drugs are often used in emergency situations to quickly raise blood pressure and reduce bleeding.

See also

• Vasodilator
• Blood pressure
• Hypotension
• Shock (circulatory)
• Bleeding

Vasoconstrictor Resources
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