From Thyroid to Stress: 13 Hidden Reasons Behind Unexplained Weight Gain

Certain medications are well known for causing weight gain. These include antidepressants such as fluoxetine and escitalopram, beta-blockers for blood pressure, corticosteroids, and even common antihistamines like diphenhydramine. They can boost appetite, cause water retention, or slow down metabolism. Adjusting or switching medications should always be done under medical guidance.