Adrenergic drugs are medications that have been designed to stimulate specific nerves in your body. They bring about the release of two kinds of hormones – epinephrine and norepinephrine. They can as well mimic the biological functions of these two hormones in the body.
How do adrenergic drugs work?
Adrenergic drugs act on the nerves in your body’s sympathetic nervous system to stimulate them. This system is involved in the regulation of your body’s response to emergency and stressful situations. Stress induces the release of epinephrine and norepinephrine from the adrenal gland. These hormones will now act on specific parts of the body including the heart, lungs, digestive system, and sweat glands to bring about an increase in heart rate, sweating, breathing rate, and decreased digestion. All of these responses are referred to as “fight or flight” response.
Adrenergic drugs have structures similar to epinephrine and norepinephrine. Certain receptors in the body called adrenergic receptors will be the recipient of epinephrine and norepinephrine including adrenergic drugs. The receptors will respond to adrenergic drugs the same way they will respond to epinephrine and norepinephrine. And their response is termed “flight or fight” response
Adrenergic drugs are very useful in:
- increasing heart rate
- constricting blood vessels
- increasing blood pressure
- opening the airways of the lungs
- stopping bleeding
Types of adrenergic drugs and their uses
Different conditions need different adrenergic drugs. Every adrenergic drug has a particular receptor it targets.
It, therefore, implies that every adrenergic drug has a specific action it can produce. Adrenergic drugs can act directly as chemical messengers. They can also act indirectly by causing the release of needed chemical messengers.
Bronchodilators have the ability to keep open bronchial tubes. Bronchial tubes are air passages. Their site of action is the beta receptors. Their binding on these beta receptors will force open, the airways that lead to the lungs. Once the airways are opened,
- chronic obstructive pulmonary disease (COPD)
Examples of bronchodilators are:
Vasopressors have four receptors they can act on – dopamine, beta-1, beta-2
Vasopressor drugs induce the contraction of smooth muscle in blood vessels. Contraction of these blood vessels brings about their narrowing. Blood pressure will become increased by this action.
Increasing blood pressure can treat shock. Narrowing blood vessels can also bring an end to the
Certain vasopressors have also been useful in treating colds and allergies. They have the ability to shrink swollen blood vessels found in the mucous membranes of the nose. This category of vasopressors is called nasal decongestants.
Examples of common vasopressors include:
Cardiac stimulators have the potential of stimulating and restoring
Epinephrine is a cardiac stimulator. It will be injected directly into your heart so as to restore its beating.
If you are thinking of adrenergic drugs, you should as well think of their side effects and your own history (medical history). Side effects of adrenergic drugs depend on the specific type being used.
Everyone will not experience the same side effects. Please note that all adrenergic drugs will not produce the same effect on everyone. Your health status other than what needs to be treated with an adrenergic drug determines the type of adrenergic drug that will be used. You doctor can help you make the right choice. Just speak to him or her about it.