Spécialisé

Weight Loss Drug Comparison

Starting BMI

Monthly Budget ($)

Duration (months)

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Qu'est-ce que Weight Loss Drug Comparison?

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The Weight Loss Drug Comparison Calculator lets you compare the efficacy, cost, side effect profile, and dosing convenience of all major anti-obesity medications including semaglutide, tirzepatide, phentermine, orlistat, naltrexone-bupropion, and liraglutide. It uses clinical trial data to rank options by your priorities.

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Formule

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f(x)

Comparison Score = (Efficacy Weight × %BWL) + (Cost Weight × Affordability Index) + (Side Effect Weight × Tolerability Score)

Légende des variables

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Symbole	Nom	Unité	Description
%BWL	Body Weight Loss	%	Mean percentage of body weight lost in clinical trials
C	Monthly Cost	$/month	Average monthly out-of-pocket cost
T	Tolerability Score	0-100	Inverse of discontinuation rate due to adverse events in trials
R	Route of Administration	text	Oral, subcutaneous injection, or other delivery method

Comment Weight Loss Drug Comparison

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1Select which medications you want to compare (2-6 options)
2Weight your priorities: efficacy, cost, tolerability, convenience, or cardiovascular benefit
3View a side-by-side comparison table with clinical data for each metric
4Get a ranked recommendation based on your weighted preferences

Exemples résolus

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Exemple 1

Donné:Compare semaglutide 2.4 mg vs tirzepatide 15 mg, priority: efficacy

Résultat:Tirzepatide 15 mg: 20.8% BWL (SURMOUNT-1), weekly injection, ~$1,023/mo. Semaglutide 2.4 mg: 14.9% BWL (STEP 1), weekly injection, ~$1,349/mo. Tirzepatide ranked #1 for efficacy.

Exemple 2

Donné:Compare phentermine vs semaglutide, priority: cost

Résultat:Phentermine: 5-7% BWL, daily pill, ~$30/mo generic. Semaglutide: 14.9% BWL, weekly injection, ~$1,349/mo. Phentermine ranked #1 for cost, semaglutide #1 for efficacy.

Applications pratiques

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Patients discussing medication options with their weight management physician

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Formulary committees at hospitals evaluating which anti-obesity drugs to include

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Health technology assessment bodies comparing value for money across obesity treatments

Questions fréquentes

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Which weight loss drug is most effective?

As of 2024, tirzepatide (Zepbound/Mounjaro) shows the highest average weight loss in clinical trials at 20.8% body weight loss, followed by semaglutide (Wegovy) at 14.9%. However, individual responses vary, and the best medication depends on your medical history, insurance, and tolerability.

Can I combine weight loss medications?

Some combinations are used off-label (e.g., GLP-1 + metformin, or GLP-1 + phentermine), but combining two GLP-1 receptor agonists is not recommended. Always consult your prescriber before combining any weight loss medications, as interactions and additive side effects can be dangerous.

Erreurs courantes à éviter

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!Comparing short-term trial data (12 weeks for phentermine) with long-term data (68 weeks for semaglutide)
!Not considering that some medications are FDA-approved for short-term use only (phentermine)
!Ignoring contraindications — not all medications are safe for all patients (e.g., phentermine is contraindicated with uncontrolled hypertension)

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Conseil Pro

Ask your provider to check your insurance formulary for preferred vs. non-preferred status — sometimes a slightly less effective medication has dramatically better coverage, making it the practical best choice.

Références

›Comparative effectiveness of anti-obesity medications — Lancet 2022
›AGA guideline on pharmacological management of obesity, Gastroenterology 2022

📖Difficulté:Intermédiaire

Accuracy-checked

Reviewed October 2026

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