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Comparing SSRI Weight Effects
March 31st, 2026

Does Paroxetine Cause More Weight Gain than Other Ssris?

Yes, paroxetine (Paxil) causes more weight gain than most other SSRIs. Studies show paroxetine users gain an average of 3-5 pounds over 6-12 months, compared to 1-3 pounds with sertraline or fluoxetine. This occurs because paroxetine has stronger antihistamine and anticholinergic effects that slow metabolism and increase appetite. Long-term studies indicate up to 25% of paroxetine users experience clinically significant weight gain (>7% of body weight), versus 10-15% with other SSRIs. Escitalopram and sertraline are generally considered more weight-neutral alternatives. If weight gain is a concern, discuss switching medications with your doctor.

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