Which drug is used to prevent preterm labor? 1 oxytocin 2 nifedipine 3 raloxifene 4 clomiphene

Nifedipine.

Explanation:

The gestation period of the human females is nine months. The labor pain is necessary for the parturition of the baby. Labor is divided into two phase the latent phase and the acute phase.

Nifedipine may be defined as a drug that are used to reduce the hypertension and reduces the pain of the pre term labor. This main drug acts as the calcium channel blockers and reduces the contraction of the uterine thus postpone the preterm labor.

Thus, the answer is nifedipine.

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