Weight Gain Guide: Causes, Medications and When to See a Doctor

What causes weight gain: medication side effects, thyroid and hormonal conditions, sleep and cortisol, plus the warning signs that need a doctor rather than a diet.

Does Birth Control Cause Weight Gain? What the Trials Show

Combined pills, patches and rings are weight-neutral in placebo-controlled trials. The injection is the exception. What the randomised ECHO trial found, and the six-month rule that tells you which group you are in.

Does Mirtazapine Cause Weight Gain? What the Evidence Shows

Mirtazapine ranks highest for risk of significant weight gain but only mid-table for average gain. Both are true, and the gap explains the drug's reputation.

Does Prednisone Cause Weight Gain? What to Expect and Why

Prednisone weight gain is three separate processes on three timelines fluid, appetite-driven fat, and fat redistribution and they reverse differently. Inhaled steroids are not the same thing.

Do Gabapentin and Pregabalin Cause Weight Gain?

Pregabalin carries a clearly higher weight-gain risk than gabapentin, despite the two being prescribed almost interchangeably. Trial figures, the swelling mechanism, and what predicts it.

Michael Smith

Michael Smith writes HealthCoachJP's weight-management and nutrition coverage. His work focuses on how medications, hormones and sleep affect body composition, and on separating evidence-based fat-loss guidance from diet-industry claims. He sources from NIH, CDC and NIDDK plus peer-reviewed research, and checks every clinical claim against a primary source before publication. He is a health writer, not a clinician, and his articles are not medical advice.