Question:
Ritodrine and Isoxsuprine work as a tocolytic by the:
Ritodrine and Isoxsuprine work as a tocolytic by the:
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$\beta_{2}$ stimulation = Relaxation. These drugs mimic the "Fight or Flight" relaxation of certain smooth muscles.
Updated On: May 25, 2026
- Sympatholytic
- Sympathomimetic
- Parasympathomimetic
- Parasympatholytic
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Tocolytics are medications used to suppress premature labor by relaxing the uterine smooth muscles.
Step 2: Meaning
Sympathomimetics are agents that mimic the effects of the sympathetic nervous system, specifically acting on adrenergic receptors.
Step 3: Analysis
Ritodrine and Isoxsuprine are selective $\beta_{2}$-adrenoceptor agonists. Activation of these receptors in the uterus leads to an increase in intracellular cAMP, which inhibits the contraction of smooth muscle.
Step 4: Conclusion
Because they stimulate sympathetic $\beta_{2}$ receptors, they are classified as sympathomimetics. Final Answer: (B)
Tocolytics are medications used to suppress premature labor by relaxing the uterine smooth muscles.
Step 2: Meaning
Sympathomimetics are agents that mimic the effects of the sympathetic nervous system, specifically acting on adrenergic receptors.
Step 3: Analysis
Ritodrine and Isoxsuprine are selective $\beta_{2}$-adrenoceptor agonists. Activation of these receptors in the uterus leads to an increase in intracellular cAMP, which inhibits the contraction of smooth muscle.
Step 4: Conclusion
Because they stimulate sympathetic $\beta_{2}$ receptors, they are classified as sympathomimetics. Final Answer: (B)
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