Testosterone Suspension
Half-life
4 hr
Time to Peak
4 hr
Steady State
~1 days
Bioavailability
100%
Dose Range
25–100 mg
Frequency
Daily
Overview
Unesterified testosterone in water-based microcrystalline suspension. Fastest onset of any injectable testosterone but extremely short duration. Painful injection due to water vehicle with microcrystals. Rarely used in modern TRT.
Mechanism of Action
Microcrystalline testosterone dissolves at the injection site and enters systemic circulation rapidly. No ester hydrolysis required.
Dosing Information
| Route | Dose Range | Half-life | Tmax | Frequency |
|---|---|---|---|---|
| Intramuscular (IM) | 25–100 mg | 4 hr | 4 hr | Daily, Every other day |
Storage & Handling
room_temperature — Store at 20-25C (68-77F). Shake well before use — microcrystalline suspension settles.
Used in Regimens
Testosterone Suspension is not currently part of any catalog regimen.
Data Sources
- Peer-reviewed Behre & Nieschlag 1998 — Testosterone Suspension
Related Tools
Track Testosterone Suspension with Doseline
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