What is a common side effect associated with antidepressants?

Weight gain is indeed a common side effect associated with many classes of antidepressants, particularly certain selective serotonin reuptake inhibitors (SSRIs) and tricyclic antidepressants (TCAs). The mechanism behind this side effect can vary but often involves changes in metabolism, appetite stimulation, and fluid retention. As patients adjust to their medication, these changes can lead to an increase in weight over time, which can be a concern for many individuals prescribed these medications.

Other listed side effects, while they can occur with some medications under specific circumstances, are not as commonly recognized as weight gain when it comes to antidepressants. Low blood pressure and increased heart rate might be more associated with other types of medications, and dry throat can occur but is less prevalent compared to the significant concern of weight gain. Given the focus on long-term effects and the number of patients affected, weight gain stands out as a notable side effect in the context of antidepressant therapy.