Shared decision‑making for antidepressants with weight‑effect estimates
STEP 1 — Gather Information
Collect depression diagnosis, baseline weight/BMI, comorbidities, prior antidepressant trials, expected treatment duration, and patient’s specific concerns or preferences regarding weight change.
STEP 2 — Rule In / Rule Out
If antidepressant therapy is indicated and the patient expresses concern about weight‑related side effects, proceed to weight‑effect discussion; otherwise, prescribe using standard efficacy/safety criteria without a formal weight‑effect conversation.
STEP 3 — Classify or Stratify
Stratify candidate antidepressants by published mean weight change (e.g., bupropion ≈ –1 kg, sertraline ≈ +0.5 kg, paroxetine ≈ +1–2 kg) into categories of weight loss, neutral, or gain, adjusting estimates for the anticipated length of treatment.
STEP 4 — Decide
Engage in shared decision‑making: present the quantitative weight‑effect estimates alongside efficacy, tolerability, and other side‑effect profiles; elicit patient values; select the antidepressant that best aligns with clinical goals and patient preferences; document the discussion and chosen agent.
Clinical Guardrails / Mimics / Pitfalls
Do not let weight‑effect estimates override efficacy or safety; avoid presenting mean changes as guaranteed individual outcomes; do not omit discussion of other adverse effects; do not use the estimates to pressure the patient toward a particular drug.
Concrete Clinical Example
A 45‑year‑old woman with MDD, BMI 31 kg/m², worries about weight gain and plans 6 months of treatment. The clinician shares estimates: bupropion –1 kg (loss), sertraline +0.5 kg (small gain), paroxetine +1.5 kg (moderate gain). After reviewing efficacy and side‑effects, she chooses bupropion.
Source: Pharmacological Management of Obesity: An Endocrine Society Clinical Practice Guideline, Endocrine Society, 2015, DOI: 10.1210/jc.2014-3415