Peptide Stack Checker
Free pairwise checks for BPC-157, TB-500, GLP-1s, growth-hormone peptides, melanocortins, and 40+ others — against each other and against supplements, hormones and medications.
Reviewed by the DoseRoutine team · July 26, 2026 · Sources: NIH, PubMed, FDA labels, PubChem.
Run a live pairwise check
Pick any two compounds — DoseRoutine shows how the pair is generally regarded, why, and where the information came from. Free, no sign-up.
Open the Interaction CheckerPeptides most-checked on DoseRoutine
Tap any peptide to open its full library page — how it works, half-life, typical amounts, mixing notes, when to avoid it, and every known pairwise overlap.
- BPC-157Tissue repair, tendon and gut healing
- TB-500Systemic recovery and vascular repair
- SemaglutideGLP-1 for weight and glucose
- TirzepatideGLP-1/GIP dual agonist
- RetatrutideTriple agonist (GLP-1/GIP/glucagon)
- IpamorelinGHRP — selective GH release
- CJC-1295GHRH analog (with/without DAC)
- SermorelinGHRH for pulsatile GH
- TesamorelinVisceral fat GHRH analog
- MOTS-cMitochondrial peptide
- EpithalonTelomerase / longevity peptide
- PT-141Melanocortin — libido
- Melanotan IIMelanocortin — tanning/libido
- GHK-CuCopper peptide — skin and repair
- AOD-9604Fat-loss GH fragment
Common peptide interaction questions
Can I stack BPC-157 with TB-500?
BPC-157 and TB-500 are commonly used together in research settings for tissue repair — BPC-157 acts more locally while TB-500 acts systemically. No hard pharmacokinetic conflict is documented, but both are research peptides not FDA-approved for human use. Cycle length, amount and injection site rotation still matter. Confirm with your doctor before combining anything.
Does BPC-157 interact with testosterone or TRT?
There's no documented interaction between BPC-157 and exogenous testosterone. BPC-157 does not appear to alter HPTA function. That said, BPC-157 is not FDA-approved, and combining research peptides with hormone therapy makes your routine harder to keep track of — blood work with your prescriber is the safest path.
Can I take GLP-1s (semaglutide, tirzepatide) with peptides like BPC-157?
There is no known direct interaction between GLP-1 receptor agonists and BPC-157. However, GLP-1s already slow gastric emptying and can cause nausea; adding gut-active peptides can compound stomach side effects. Space injections apart, hydrate well, and report any severe abdominal pain to your doctor immediately.
Is it safe to combine growth-hormone peptides (CJC-1295, ipamorelin) with TRT?
GHRH/GHRP peptides and TRT are commonly stacked, but the combination raises insulin resistance, water retention, and estrogen-conversion risks. It needs baseline and follow-up labs (fasting glucose, HbA1c, IGF-1, estradiol, hematocrit). This is not a combination to self-manage — keep your prescriber in the loop.
Which peptides should never be combined?
Avoid stacking two GLP-1 agonists (e.g. semaglutide + tirzepatide) — receptor competition and severe stomach risk. Avoid combining melanocortin peptides (PT-141 + Melanotan II) — cardiovascular and pigmentation load. Never combine peptides with medications you have been prescribed without checking with your doctor first.
Does DoseRoutine's peptide checker cover research compounds?
Yes. Our library includes 475+ compounds — peptides classified as research-use-only in some jurisdictions are included for interaction cross-checking only. Listing a compound is not an endorsement of its use, legality, or safety in your jurisdiction.
Track your peptide stack
Add these peptides to DoseRoutine and we'll cross-check every pairwise interaction, schedule injections with site rotation, track vial inventory, and generate a shareable PDF summary.
Educational, not medical advice. Talk to a licensed clinician before combining or changing what you take. Terms, privacy & disclaimer.