Depot
Definition
A reservoir left at the site of administration that releases slowly into circulation, stretching duration of action. Acylated and PEGylated molecules achieve a comparable effect in the bloodstream rather than at the site.
What this means for research sourcing
This term describes handling relevant to laboratory research protocols only — Volta compounds are supplied strictly for in vitro research use.
Related Terms in Administration
Co-Administration
Two or more compounds given in the same session. In published work this usually means separate sequential administrations; combining them in one syringe requires compatibility data on diluent, pH and post-mix stability, which for most research peptide pairs does not exist.
Peptide Stack
The literature's term for two or more peptides studied together on the expectation that their mechanisms are complementary, such as a GHRH analogue with a GHRP. Most combinations discussed under this heading have no controlled trial behind them.
Injection Site Rotation
Standard clinical practice with any repeatedly injected drug, in which the site is moved systematically so that one area is not used again and again. The published rationale is avoiding lipohypertrophy, scarring and the erratic absorption that follows both.
Lipohypertrophy
A local accumulation of fat tissue that develops where injections are given repeatedly in one place. It is well documented in insulin therapy, where it changes absorption from the affected area and so changes the exposure a given amount produces.
Route of Administration
Which path a compound takes in the studies that report it: intravenous, subcutaneous, intramuscular, intranasal, oral or topical, as named in the literature. Route decides how much reaches circulation and how fast, so two papers on one molecule by different routes are not comparable.
Intramuscular (IM)
Into muscle tissue, better perfused than subcutaneous fat and so faster to absorb in the studies that compare the two. It is used in the literature where a formulation calls for it rather than as a default.
Intravenous (IV)
Straight into a vein, which by definition delivers the whole amount to the circulation and is the reference point every other route's bioavailability is measured against. In studies it is performed under clinical supervision.
Intranasal
Across the nasal mucosa. Trials of Semax, Selank and oxytocin use this route because it avoids gastric and hepatic degradation and because the olfactory epithelium offers a path toward the central nervous system.