Lexapro does cause weight gain in some people. This may happen because it can increase appetite, which can lead to gradual weight changes over time.
However, people can respond to Lexapro (escitalopram) in different ways. Some may have a reduced appetite instead, although weight loss is less common. In rare cases, escitalopram may be associated with more significant changes in eating behavior, such as anorexia.
Headache is a very common side effect of escitalopram. Other common side effects include anxiety, agitation, increased sweating, dizziness, insomnia, drowsiness, nightmares, fatigue, nausea, vomiting, diarrhea, constipation, dry mouth, joint pain, and muscle pain. Escitalopram can also cause sexual dysfunction, such as low libido, difficulty achieving orgasm in women, delayed ejaculation, and erectile dysfunction in men.
These side effects are usually most noticeable during the first two weeks of treatment. After that, they often become milder and may occur less frequently.
Lexapro is commonly used to treat depression, panic disorder, obsessive-compulsive disorder (OCD), generalized anxiety disorder (GAD), and social anxiety disorder.
If you have questions about taking Lexapro, or if you notice side effects that are bothering you, contact the psychiatrist or other health care professional who prescribed it. They can review your symptoms and, if needed, adjust your dose or switch you to a different treatment.