Route
SUBQ
Typical dose range
100 mcg to 500 mcg
Frequency
daily
Half-life
3 hours
Cycle on / off (days)
14 / 14
Evidence grade
C
Reconstitution math
Open the pre-filled P21 reconstitution calculator to compute syringe units per dose.
Reported Side Effects of P21
Effects below are summarised from peer-reviewed literature or regulatory labeling where it exists. Not medical advice. Individual responses vary.
Compare P21
How P21 stacks up against the peers most users consider.