GLP-1 weight management

Weight management (GLP-1 agonists) and pharmacogenetics

Also known as: GLP-1 agonists, Incretin agonists, Weight loss medications

3 medications 5 brand products GLP1RGIPR

Why pharmacogenetics matter for weight management (glp-1 agonists)

GLP-1 receptor agonists (semaglutide, tirzepatide, retatrutide) are the dominant new drug class for weight management and type 2 diabetes. They all work the same way: activating incretin receptors slows gastric emptying, increases satiety, and improves insulin response. Two SNPs explain a lot of the variation between patients. GLP1R rs10305420 affects every drug in the class. GIPR rs1800437 only matters for drugs that also activate GIP, which is tirzepatide and retatrutide.^[1]

The most actionable pharmacogenetic signal in this class is the GIPR Gln354 variant. If a patient stops tirzepatide because of nausea and carries that variant, switching to semaglutide is a logical next step. Semaglutide doesn't bind GIPR, so the variant doesn't apply.

Key genes in this class

GLP1R

Glucagon-Like Peptide-1 Receptor

GLP1R is the cell-surface receptor that GLP-1 drugs like semaglutide and tirzepatide bind to. A common variant (rs10305420, Pro7Leu) changes how efficiently the receptor gets made and shipped to the …

GIPR

Gastric Inhibitory Polypeptide Receptor

GIPR is the receptor for GIP, the second incretin hormone. It is the target of the GIP arm of tirzepatide and retatrutide. The Glu354Gln variant (rs1800437) lowers GIPR function, and …

Medications in this class with pharmacogenetic guidelines

Each link goes to the drug's full pharmacogenetics page with CPIC and FDA phenotype recommendations.

Retatrutide GIPR / GLP1R Semaglutide GLP1R Tirzepatide GIPR / GLP1R

Brand products in the GLP-1 weight management class

Combined products and brand names for the medications above. Each links to a pharmacogenetic breakdown.

References

PharmGKB / Stanford University. PharmGKB: The Pharmacogenomics Knowledge Base. pharmgkb.org

Which glp-1 weight management is right for your genetics?

This page covers the pharmacogenetics of weight management (glp-1 agonists) in general. A Gene2Rx report tells you how your personal genotype interacts with every drug on this page.

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Informational only, not medical advice. Pharmacogenetic guidelines describe population-level patterns that inform prescribing decisions. Never start, stop, or change a medication without talking to your prescribing clinician.