Testosterone Suspension

Testosterone aas IM Published Clinical Data

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

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Reminders, medication level charts, injection site rotation, and protocol tracking — all free, all private.

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Doseline provides informational tools only. It is not a medical device and does not provide medical advice. Always consult a qualified healthcare provider.

Doseline provides informational tools only. It is not a medical device and does not provide medical advice. Always consult a qualified healthcare provider.