NHS Nebido Protocol
NHS-standard 1000 mg testosterone undecanoate (castor oil) every 10–14 weeks.
Concentration over time
| Date | Testosterone Undecanoate (Castor Oil) |
|---|---|
| W1 | 0.00 |
| W2 | 771.19 |
| W3 | 774.48 |
| W4 | 685.80 |
| W5 | 596.36 |
| W6 | 517.10 |
| W7 | 448.18 |
| W8 | 388.42 |
| W9 | 336.62 |
| W10 | 291.73 |
| W11 | 252.83 |
| W12 | 219.11 |
| W13 | 189.89 |
Protocol summary
NHS Nebido Protocol · 12 weeks starting Jul 20, 26
- Testosterone Undecanoate (Castor Oil) — 1000.0 mg Every 12 weeks, weeks 0–1
Protocol overview
- Category
- trt hrt
- Duration
- 12 weeks
- Compounds
- 1
- Tags
- trt, nebido, nhs
Compounds in this protocol
- Testosterone Undecanoate (Nebido) — 1000 mg, every-12-weeks (weeks 0-1)
How to read this protocol
The chart above shows the modeled blood concentration of each compound over the 12-week duration. Each compound accumulates toward steady state (roughly 5 half-lives). The peak-to-trough ratio within each dose interval depends on the injection frequency relative to the half-life.
Use the [peak-trough estimator](/tools/peak-trough) to see predicted levels at any point, or the [clearance calculator](/tools/clearance) to estimate washout after the protocol ends. The [PCT planner](/pct-planner) estimates when to start post-cycle therapy.
Educational only. Not medical advice. Concentration values are modeled estimates based on population pharmacokinetics, not predictions of individual blood levels.