Half-life estimate, not bloodwork or dosing advice. Disclaimer.
Long ester. Slow rise, heavy accumulation, and a long washout — useful for seeing how a long half-life changes the curve. A 750 mg dose is about 473 mg of testosterone, and that is what the line draws. Also called Testosterone undecanoate, Aveed.
| Half-life | 34d |
|---|---|
| Time to peak | 7d |
| Parent hormone | 63% |
| Example input | 750 mg |
| Example frequency | every 70 days |
| Example length | 30 weeks |
| Data quality | Medium |
Half-life 34 d for castor-oil TU (Behre et al. 1999: 33.9 d); Tmax 7 d (Aveed label, Nebido SmPC); 63% testosterone (Nebido SmPC: 1000 mg = 631.5 mg). Nebido's 90-day figure is a release-rate constant and is not used. How the model works.
750 mg every 70 days for 30 weeks. With a 34d half-life, it levels off around day 210. The row ends before that, so the line is still climbing when it stops. Between doses it runs from about 162 to 613 mg, a swing of 74%. Each dose is its own spike. After the last dose, the tail takes about 179.3 days to fall to a few percent.