GLP-1 for older adults (65+)
GLP-1 trials enrolled older adults — but specific concerns around falls, sarcopenia, polypharmacy, and dose tolerability change the prescribing picture. Here is what changes after 65.
Age-related muscle loss accelerates during rapid weight loss. Resistance training (2-3×/week) and 1.0-1.2 g/lb body weight protein become non-negotiable, not optional. Body-composition scans (DXA) every 6 months are reasonable in this group; pure-scale loss is misleading.
Orthostatic hypotension is common during dose escalations due to GLP-1 thirst suppression + concurrent BP medications. Recheck standing BP every 2 weeks during titration. Consider holding diuretics on injection day in volume-depleted patients.
Older adults average 5-7 prescriptions. Slowed gastric emptying can shift levothyroxine, warfarin, digoxin absorption. Insulin and sulfonylurea doses typically need 10-20% reduction on GLP-1 start. Pharmacist review at week 0 and week 12 is wise.
Yes for many. Trial populations include adults into their 80s. The biggest considerations are falls risk during dose escalations, muscle preservation through resistance training, and pharmacist review of concurrent medications. Discuss with your prescriber and ideally a clinical pharmacist.
Without intervention, roughly 25% of GLP-1 weight loss is lean mass. With protein-first eating and resistance training, that drops to 10-15%. Older adults entering a GLP-1 should plan resistance training before they start, not after.
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