MK-2866 vs Telmisartan
Moderate Research vs FDA Approved
avoid Mechanism-based · 64% Both MK-2866 and Telmisartan carry hepatotoxic risk. Combining hepatotoxic compounds significantly increases liver damage potential. If unavoidable, include liver support (TUDCA/NAC) and monitor ALT/AST frequently.
Molecular Data
MK-2866 Telmisartan
Weight 389.33 Da 514.62 Da
Half-life ~24 hours ~24 hours
Type Non-steroidal selective androgen receptor modulator (C19H14F3N3O3) Benzimidazole derivative (C33H30N4O2)
Key Benefits
MK-2866
01 Increases lean body mass in a dose-dependent manner with clinical trial support
02 Preserves muscle mass during caloric deficit or catabolic conditions
03 Selective tissue activity reduces androgenic side effects compared to anabolic steroids
04 Oral bioavailability eliminates the need for injections
05 Does not aromatize to estrogen, avoiding gynecomastia and water retention
06 Improves physical function and stair-climbing power in clinical populations
07 Long 24-hour half-life allows convenient once-daily dosing
08 Mild side effect profile at commonly studied doses
Telmisartan
01 Potent 24-hour blood pressure reduction with once-daily dosing
02 Protection against AAS-induced left ventricular hypertrophy and cardiac remodeling
03 Nephroprotection through reduced intraglomerular pressure and proteinuria
04 Unique partial PPAR-gamma agonism improving insulin sensitivity and lipid metabolism
05 No negative impact on exercise performance, VO2 max, or recovery
06 Reduction of pathological vascular remodeling and arterial stiffness
07 Longest half-life of all ARBs ensuring consistent 24-hour coverage
08 Well-tolerated with a low incidence of side effects compared to ACE inhibitors (no dry cough)
Side Effects
MK-2866
Mild testosterone suppression (dose-dependent, typically 10-30% reduction at 25 mg)
HDL cholesterol reduction (10-20% suppression observed in clinical trials)
Headaches, particularly during the first 1-2 weeks
Mild back pain or muscle cramps
Transient fatigue toward the end of longer cycles
Slight reduction in libido at higher doses or extended cycle lengths
Telmisartan
Dizziness or lightheadedness, particularly during the first few days or after dose increases
Mild hypotension, especially in volume-depleted individuals or those on concurrent antihypertensives
Upper respiratory tract infection symptoms (sinusitis, pharyngitis) - reported in clinical trials at rates similar to placebo
Back pain and myalgia (uncommon but reported)
Fatigue
Contraindications
Active liver disease or significantly elevated liver enzymes
Hormone-sensitive cancers (breast, prostate) without oncologist clearance
Pregnancy or breastfeeding (potential endocrine disruption to fetus/infant)
Individuals under 21 years of age (risk of premature HPTA disruption during development)
Concurrent use of hepatotoxic medications without liver function monitoring
Known hypersensitivity to MK-2866 or any formulation excipients
Competitive athletes subject to WADA or USADA anti-doping testing
Pregnancy (Category D - can cause fetal injury and death; discontinue immediately if pregnancy is detected)
Bilateral renal artery stenosis
Known hypersensitivity to telmisartan or any excipients
Concurrent use with aliskiren in patients with diabetes or renal impairment (eGFR <60)
Severe hepatic impairment or biliary obstruction (telmisartan is eliminated primarily via biliary excretion)
Research Evidence
MK-2866 Telmisartan
Status Moderate Research FDA Approved
References 5 studies 5 studies
Latest — 2023
FDA Approved No Yes
This comparison is for educational and research purposes only. Consult a healthcare professional before use.