Which of the following drugs can cause galactorrhea
**Core Concept**
Galactorrhea is a condition characterized by the spontaneous flow of milk from the breast, not associated with childbirth or nursing. It is often a symptom of hyperprolactinemia, which can be caused by various factors, including hormonal imbalances and certain medications. The condition is mediated by the prolactin hormone, which stimulates milk production in the breast.
**Why the Correct Answer is Right**
The correct answer is a medication that can cause an increase in prolactin levels, leading to galactorrhea. This can occur through various mechanisms, such as dopamine blockade, which inhibits the normal inhibition of prolactin release by dopamine. For example, the use of antipsychotic medications like risperidone can lead to an increase in prolactin levels due to their blockade of dopamine D2 receptors in the pituitary gland.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not have a known association with galactorrhea.
* **Option B:** This option is incorrect because, although it can affect hormone levels, it is not typically associated with galactorrhea.
* **Option D:** This option is incorrect because it is not a known cause of galactorrhea.
**Clinical Pearl / High-Yield Fact**
Remember that medications that block dopamine receptors, such as antipsychotics, can lead to hyperprolactinemia and galactorrhea. This is an important consideration when prescribing these medications, especially for women of childbearing age.
**Correct Answer:** C. Metoclopramide (a medication that blocks dopamine receptors and can cause an increase in prolactin levels, leading to galactorrhea).