Cagrilintide for Health & Longevity - Quick Reference Sheet

Cagrilintide for Health & Longevity

Created on 10/06/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 5.5 – Audit

Cagrilintide, an experimental once-weekly injectable drug copying amylin, a pancreatic fullness hormone, is studied for weight loss and is approved nowhere. Compared with inactive injections it produced meaningful, sustained weight loss, somewhat less than leading gut-hormone drugs but with less vomiting, plus a modest blood-pressure benefit. Side effects are mainly digestive and usually mild. Outside clinical trials only unregulated "research" chemicals exist, and weight is expected to return after stopping. (Full Review)

Protocol

Standard regimen
2.4 mg once weekly
Subcutaneous injection after a 16-week escalation
Escalation steps
0.25 mg to 2.4 mg over 16 weeks
Raised in roughly 4-week steps
Time of day
Fixed weekday
Time of day matters little; some prefer evening injection so peak nausea falls during sleep
Time to effect
Body weight reduction
Clear loss by 26 weeks
Accumulates during the 16-week escalation and continued through 68 weeks
Lower blood pressure
68 weeks
Lower than placebo at 68 weeks in REDEFINE 1
Improved blood sugar control in type 2 diabetes
32 weeks
HbA1c fell over 32 weeks, without a placebo group

Benefits

Contraindications
  • Pregnant or breastfeeding women and those planning pregnancy
  • People under 18 years
  • People with confirmed gastroparesis or hypoglycemia unawareness (theoretical)
  • People with type 1 diabetes on insulin (theoretical)
  • People with a current or past eating disorder (theoretical)
  • Anyone with prior hypersensitivity to cagrilintide or its formulation
Key Interactions
  • GLP-1 receptor agonists (semaglutide, tirzepatide): Monitor; additive nausea and constipation
  • Insulin and sulfonylureas (insulin glargine, glimepiride): Caution (theoretical); severe hypoglycemia
  • Oral drugs needing rapid or steady absorption (levothyroxine, warfarin): Monitor (theoretical); delayed absorption
  • Gut-slowing prescription drugs (oxybutynin, oxycodone): Caution (theoretical); worsened constipation
  • Blood-pressure medications that block the renin-angiotensin system or increase urine output (losartan, hydrochlorothiazide): Monitor (theoretical); additive pressure lowering
  • Over-the-counter sedating antihistamines and loperamide (diphenhydramine): Caution (theoretical); added constipation
  • Over-the-counter NSAIDs (ibuprofen): Caution (theoretical); kidney injury with dehydration
  • Glucose-lowering supplements (berberine): Monitor (theoretical); additive glucose lowering
  • Blood-pressure-lowering supplements (garlic extract, magnesium): Monitor (theoretical); additive pressure lowering
  • Viscous fiber supplements (psyllium): Monitor (theoretical); worsened bloating
  • Alcohol and prolonged fasting or very-low-calorie diets: Caution (theoretical); hypoglycemia with glucose-lowering drugs, dehydration

Risk & Side Effects

  • High: Gastrointestinal adverse events
  • Medium: Injection-site reactions; fatigue
  • Low: Serious adverse events; low blood sugar with insulin or insulin-releasing drugs; gallbladder events
  • Speculative: Renin-angiotensin system activation; lean mass loss

Monitoring

Marker Target Why
Body weight No established target; track percentage change from own baseline Efficacy
Waist-to-height ratio No established target; track change from own baseline Central fat
Blood pressure Below 130/80 mm Hg Efficacy; safety check for dizziness with blood-pressure drugs
HbA1c 4.0–5.6% Efficacy in diabetes; hypoglycemia safety check with glucose-lowering drugs
Fasting glucose 70–99 mg/dL Safety check for hypoglycemia with insulin or sulfonylureas
eGFR Above 60 mL/min/1.73 m² Safety check for dehydration-related kidney injury
Lean mass by DXA No established target; track the share of lost weight that is lean tissue Body composition

Cadence: Weight and blood pressure weekly at home during the 16-week escalation, then monthly; HbA1c and kidney function at 3 months, then every 6 months; fingerstick glucose daily during escalation for insulin or sulfonylurea users; body composition at 6 and 12 months.

Qualitative Assessment

  • Appetite, fullness and reduced "food noise" (intrusive food thoughts)
  • Nausea, bowel habits and bloating
  • Energy levels and fatigue
  • Strength and exercise performance
  • Sleep quality, especially after injection day
  • Relationship with food and absence of restrictive-eating patterns