Cycle (Research Protocol)
Also known as: cycle · on-cycle · research cycle
A defined period of administration followed by a break — the on/off structure many research protocols follow.
A cycle is a defined window of administration followed by a rest period. Structuring research this way is used to study effects over a set duration and to allow washout between periods.
Cycle length and the length of the break vary by compound and research question. This is reference terminology describing how protocols are structured; nothing here is dosing guidance, and all compounds are for research purposes only.
RELATED TERMS
Titration
Gradually adjusting an amount — usually starting low and increasing — to find a suitable level in a research protocol.
Loading Dose
A larger initial amount used to reach a target level quickly, before settling to a smaller maintenance amount.
Maintenance Dose
The smaller ongoing amount that holds a compound at a target level after any initial loading phase.
Half-Life
The time for a compound’s concentration to fall by half — a key determinant of dosing frequency in research.
Research Use Only (RUO)
A designation that a compound is supplied strictly for laboratory research and is not intended for human or veterinary use.
Educational content, not medical advice. All products supplied for research purposes only — not for human consumption.