Dosing and scheduling
Every Other Day (EOD)
Last updated
A dosing frequency in which a dose is taken one day and skipped the next, repeating. It is one of the most commonly quoted frequencies in community protocols, largely because it is easy to remember and halves the number of injections. Whether it suits a given compound depends on how long that compound persists in the body.
Why it matters here
Every other day is often chosen for convenience or cost rather than because anything about the compound points to it, and those two reasons are easy to confuse when reading someone else's protocol. For a fast-clearing compound it produces long stretches with almost nothing present, which may be very unlike the exposure the evidence was built on.
What it is not
Every other day is not three times a week, though people swap the two freely. Every other day keeps an even gap and drifts across the calendar, while three times a week pins the days and leaves one gap longer than the others.
Also called
- every other day (eod)
- every other day
- eod
- e.o.d.
- eod dosing
- alternate day
- alternate-day dosing
- every second day
- every 2 days
- q2d
- other day
EOD is forum shorthand and is written every way you can imagine. Q2D is the clinical equivalent and means the same thing, usually appearing when someone is copying language straight out of a paper.
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.