Question

Anesthetic agent or agents which have a tocolytic effect are?

• A. Halothane
• B. Enflurane
• C. Isoflurane
• D. All the above

Hint:

Halogenated volatile anaesthetics share a dose-dependent uterine relaxing effect.

Answer 1

The Correct Option is D

Step 1: The key word is tocolytic, meaning the agent relaxes uterine muscle and reduces contractions. We need to decide whether one or all of the listed inhalational agents do this.

Step 2: Halothane, enflurane and isoflurane belong to the halogenated volatile anaesthetic group. A shared class effect of these agents is dose-dependent relaxation of uterine smooth muscle, cutting both the strength and frequency of contractions.

Step 3: Because the uterine-relaxing action is a property of the whole halogenated group rather than a single drug, every option individually qualifies, making All the above correct. Clinically this is exploited for intrapartum uterine relaxation.

\[\boxed{\text{All the above}}\]