Medications & Weight
"Will this medication make me gain weight?" is one of the most-asked health questions — and the honest answer is usually more nuanced than a yes or no. These guides summarize what the FDA labeling, Mayo Clinic, ACOG, MedlinePlus and Drugs.com actually say, so you can have a better-informed talk with your own doctor or pharmacist.
Weight change is a genuine concern with some medications and a myth with others. Antidepressants vary widely — a few are linked to weight gain, several are weight-neutral, and one is associated with weight loss. Most birth control methods show no strong evidence of significant weight gain (the shot being the main exception). And drugs people often worry about, like metformin and Ozempic, are actually associated with weight stability or loss, not gain.
Every guide below is written to be balanced and accurate, attributes its medical claims to named authorities, and carries a clear reminder: this is educational information, not medical advice. Never start, stop, or change a medication based on a website — that conversation belongs with your prescriber.
Educational information, not medical advice. These pages summarize published guidance for general education. They are not a substitute for professional medical advice, diagnosis, or treatment, and they are not a recommendation for or against any medication. Always consult your doctor or pharmacist. Never stop a prescribed medication on your own. Operator: Mustafa Bilgic.
Antidepressants & weight
Effects vary by drug and person. Start with the overview, then read the specific medication.
Antidepressants & Weight Gain
The overview: which classes cause it, which don't, and why.
Read guide →Does Lexapro Cause Weight Gain?
Escitalopram and the scale — what the evidence says.
Read guide →Does Zoloft Cause Weight Gain?
Sertraline and weight, explained and cited.
Read guide →Does Prozac Cause Weight Gain?
Fluoxetine is more often linked to modest weight loss.
Read guide →Weight-Neutral Antidepressants
Options like bupropion to discuss with your doctor.
Read guide →Does Wellbutrin Cause Weight Gain?
Bupropion — usually weight-neutral or modest loss.
Read guide →Does Cymbalta Cause Weight Gain?
Duloxetine (an SNRI) — often relatively weight-neutral.
Read guide →Does Effexor Cause Weight Gain?
Venlafaxine — the other SNRI, often weight-neutral.
Read guide →Does Citalopram Cause Weight Gain?
Celexa — possible but usually modest, like Lexapro.
Read guide →Does Sertraline Cause Weight Gain?
Zoloft's generic — possible but usually modest.
Read guide →Does Abilify Cause Weight Gain?
Aripiprazole — lower weight risk among antipsychotics.
Read guide →Does Gabapentin Cause Weight Gain?
Neurontin — can cause gain, especially at higher doses.
Read guide →Does Paxil Cause Weight Gain?
Paroxetine — the SSRI most linked to weight gain.
Read guide →Does Amitriptyline Cause Weight Gain?
Elavil, a tricyclic — more likely to cause weight gain.
Read guide →Does Trazodone Cause Weight Gain?
Desyrel — relatively weight-neutral; often used for sleep.
Read guide →Antipsychotics & insulin
Two medications people often ask about — one a more weight-associated antipsychotic, the other essential for diabetes.
Does Seroquel Cause Weight Gain?
Quetiapine — can cause gain; metabolic monitoring matters.
Read guide →Does Insulin Cause Weight Gain?
Some gain is common — largely better blood-sugar control.
Read guide →Calorie Calculator
If your goal is intentional, healthy weight change — find your numbers.
Open the calculator →Birth control & weight
Most methods lack strong evidence of significant weight gain — here's the method-by-method picture.
Birth Control & Weight Gain
Pill, IUD, implant, shot, patch — what research and ACOG say.
Read guide →Does Mirena Cause Weight Gain?
The hormonal IUD — little weight effect for most users.
Read guide →Does Nexplanon Cause Weight Gain?
The arm implant — reported by some, not strongly proven.
Read guide →Does the Pill Cause Weight Gain?
Combined pills — little real effect for most people.
Read guide →Depo-Provera & Weight Gain
The shot — the method most linked to weight gain.
Read guide →Does HRT Cause Weight Gain?
Menopausal hormone therapy — not a cause of weight gain.
Read guide →Diabetes & GLP-1 drugs
Often feared for weight gain — but usually associated with weight stability or loss.
Does Metformin Cause Weight Gain?
Usually weight-neutral or linked to modest weight loss.
Read guide →Ozempic & Weight
Semaglutide is linked to weight loss; regain after stopping.
Read guide →Calorie Calculator
If your goal is intentional, healthy weight change — find your numbers.
Open the calculator →Looking for life-stage guides?
We also cover menopause, perimenopause and pregnancy weight gain — with a working pregnancy weight gain calculator built on ACOG/IOM ranges.