Which of the following beta-adrenergic agents is not short acting?
- a- Pirbuterol
- b- Salmetrol***
- c- Terbutaline
- d- Albuterol
- e- None of the above.
The correct answer is (b) salmetrol.
Pirbuterol, terbutaline, and albuterol are all short-acting beta-adrenergic agents, meaning that their effects last for a few hours. Salmetrol, on the other hand, is a long-acting beta-adrenergic agent, meaning that its effects can last for up to 12 hours.
Beta-adrenergic agents are a class of medications that mimic the effects of adrenaline, a hormone that is produced by the body in response to stress or danger. These medications are commonly used to treat asthma and other respiratory conditions by relaxing the muscles in the airways and making it easier to breathe.
Short-acting beta-adrenergic agents are typically used to relieve acute symptoms of asthma or other respiratory conditions. They are also used as rescue medications to prevent exercise-induced bronchospasm.
Long-acting beta-adrenergic agents are typically used to control chronic asthma and other respiratory conditions. They are not as effective as short-acting beta-adrenergic agents at relieving acute symptoms, but they can help to prevent asthma attacks and improve overall lung function.
Here is a table summarizing the duration of action of different beta-adrenergic agents:
|
Beta-adrenergic
agent |
Duration
of action |
|
Pirbuterol |
2-4 hours |
|
Salmetrol |
12 hours |
|
Terbutaline |
4-6 hours |
|
Albuterol |
4-6 hours |
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Pharma