Which of the following drugs is used as a bronchodilator?

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Enhance your knowledge with the Ciulla Clinical Chemistry Test. Study with interactive quizzes, featuring flashcards and multiple-choice questions. Each question offers hints and explanations for better understanding. Prepare effectively and excel in your exam!

Multiple Choice

Which of the following drugs is used as a bronchodilator?

Explanation:
Theophylline is the drug that acts as a bronchodilator. It belongs to the methylxanthine class and helps relax bronchial smooth muscle, widening the airways. It does this mainly by inhibiting phosphodiesterase, which increases cyclic AMP inside the smooth muscle cells, leading to muscle relaxation. It also blocks adenosine receptors, which can contribute to bronchodilation. This medication has been used for asthma and COPD, though it requires careful dosing because of a narrow therapeutic window and potential interactions. Phenytoin is an anticonvulsant with no bronchodilating effect. Amikacin is an antibiotic, and Clozapine is an antipsychotic; neither is used to open the airways.

Theophylline is the drug that acts as a bronchodilator. It belongs to the methylxanthine class and helps relax bronchial smooth muscle, widening the airways. It does this mainly by inhibiting phosphodiesterase, which increases cyclic AMP inside the smooth muscle cells, leading to muscle relaxation. It also blocks adenosine receptors, which can contribute to bronchodilation. This medication has been used for asthma and COPD, though it requires careful dosing because of a narrow therapeutic window and potential interactions.

Phenytoin is an anticonvulsant with no bronchodilating effect. Amikacin is an antibiotic, and Clozapine is an antipsychotic; neither is used to open the airways.

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