Final answer:
The side effects of heterocyclic antidepressants may include drowsiness, insomnia, restlessness, anxiety, dry mouth, impotence, and weight gain.
Step-by-step explanation:
The side effects of heterocyclic antidepressants may include drowsiness, insomnia, restlessness, anxiety, dry mouth, impotence, and weight gain. Other possible side effects can include dizziness, loss of sexual desire, nausea, blurred vision, agitation, and constipation.