**Core Concept**
Postpartum hemorrhage (PPH) is a leading cause of maternal morbidity and mortality worldwide. It is defined as the loss of 500 mL or more of blood after delivery. Effective management of PPH requires the administration of uterotonic agents, which are drugs that help to stimulate uterine contractions and reduce bleeding.

**Why the Correct Answer is Right**
The correct answer is the drug that is NOT typically used to control postpartum hemorrhage. Uterotonic agents such as oxytocin (synthetic), methylergonovine (ergot alkaloid), and carboprost (prostaglandin analogue) are commonly used to manage PPH. Oxytocin is often the first-line treatment due to its efficacy and safety profile. Methylergonovine is used when oxytocin is ineffective or contraindicated. Carboprost is used in cases of severe PPH, particularly when there is a need for rapid reduction of bleeding.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a type of uterotonic agent commonly used to manage postpartum hemorrhage.
**Option B:** This option is incorrect because it is not typically used to control postpartum hemorrhage. It is a medication used to manage hypertension in pregnancy.
**Option C:** This option is incorrect because it is a type of uterotonic agent, which is used to stimulate uterine contractions and reduce bleeding in postpartum hemorrhage.
**Option D:** This option is incorrect because it is not a uterotonic agent, and it is not typically used to manage postpartum hemorrhage.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the first-line treatment for postpartum hemorrhage is oxytocin, which should be administered promptly to reduce bleeding and prevent complications. Additionally, methylergonovine is contraindicated in patients with hypertension, cardiac disease, or renal disease.

**Correct Answer:** B.