Which of the following is an adverse effect of Metoclopramide?

Metoclopramide is a medication primarily used to treat nausea and vomiting, as well as to facilitate gastric emptying. One of the notable adverse effects associated with metoclopramide is the potential for extrapyramidal symptoms, which can include muscle spasms or dystonia. These muscle spasms can manifest as involuntary contractions, which are especially likely with prolonged use or at higher doses.

In the context of other potential side effects, weight gain is not commonly linked to metoclopramide, and visual disturbances typically refer to issues unrelated to this medication. Insomnia may arise due to gastrointestinal discomfort but is not a primary adverse effect of metoclopramide. Therefore, the connection between metoclopramide and muscle spasms highlights the importance of monitoring patients for movement disorders when they are prescribed this drug.