Hello, sir!
Nebido is a trade name of Bayer, as is Andriolos is a trade name of Driada Medical, while the active ingredient (Testosterone undecanoate) is identical in both products.
Bayer uses castor oil, while we use sesame seed oil.
Below is a template of kinematic viscosity measurements (mm2/s) - Fluid resistance with most major carrier oils. Top being thickest, and last being thinnest..
Castor 297.0
Crambe 53.6
High-Oleic Safflower 41.2
Peanut 39.6
Sunflower 37.1
Grapeseed 37.0
Sesame 35.3
Corn 34.9
Cottonseed 33.5
Soybean 32.6
Safflower 31.3
Castor oil is cheaper, and Bayer isn't shy about it. While it is a bit difference in half-life of the drugs, based on different oils (yes, I was surprised too) -
View attachment 174197
Serum concentrations (mean S.E.M.) of testosterone (upper panel) after single dose i.m. injections of 1000 mg TU in tea seed oil in 7 hypogonadal men (study I, squares) or castor oil in 14 hypogonadal men (study II, circles). Broken lines indicate normal range of testosterone.
castor oil has, according to experiments, a longer half life, which also leads to a lower increase in estradiol. it has more problems with a pips, prolonged negative sensations in the injection area, and difficulty in syringe recruitment and administration. The fact that 4 ml of nebido is administered at a time creates severe discomfort in motion. Even for people who get an injection by a nurse once a month, I think there is a big difference in the comfort of the application.