Taking two or more compounds over the same period, whether at the same moment or on overlapping schedules. Stack is a community term borrowed from bodybuilding, not a pharmacological one, and you will not find it in a trial report. It describes an intention to combine rather than any combination that has been tested.

Why it matters here

Nearly all the evidence on this site describes single compounds studied alone, so a stack sits outside what was actually measured. When several compounds run together and something changes, there is no way to tell which one caused it, and no way to tell whether they affected each other.

Also called

• stack
• stacking
• stacked
• stackin
• peptide stack
• combo
• combination
• running together
• multi-peptide
• stacks

Stacking comes straight from anabolic steroid vocabulary, where it described running several compounds through one cycle. The peptide community inherited the word along with the habit it names.

Compounds carrying this term

None on file yet. This term is in the controlled vocabulary but no compound record currently uses it — which is a statement about our coverage, not about the term.

See also

• Blend — Dosing and scheduling
• Co-administration — Dosing and scheduling
• Cycle — Dosing and scheduling
• Dosing Protocol — Dosing and scheduling