What is the effect of Nifedipine as a tocolytic?

Nifedipine is a calcium channel blocker commonly used as a tocolytic agent to inhibit preterm labor. Its mechanism involves relaxing the smooth muscles of the uterus, which helps to prevent contractions. One of the key effects of Nifedipine is its ability to decrease both heart rate and blood pressure.

As a vasodilator, it can lead to peripheral relaxation of blood vessels, resulting in a reduction in overall vascular resistance. This not only decreases blood pressure but also can lead to reflex bradycardia, where the heart rate may decrease as the body responds to the lower blood pressure. Therefore, when Nifedipine is used as a tocolytic, its cardiovascular effects include the decrease in heart rate and blood pressure, making this option the correct choice.

In contrast, the other options presented do not accurately reflect the pharmacological effects of Nifedipine. It does not increase the mother’s heart rate; rather, its use may lead to a decrease. Nifedipine has notable cardiovascular effects, contradicting the option that states it has no cardiovascular effects. Finally, it does not promote uterine contractions; rather, it works to inhibit them, aligning with its primary use as a to