No, it's not. Tranq is Xylazine, a veterinary sedative. It's correct that it's mixed with fent.

There's a writeup on the necrotic skin ulcers it causes here:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9482722/

Quote:

In the areas with a high prevalence of the use of xylazine mixed with fentanyl or heroin, abscesses, and painful skin ulcers are very often reported. The mechanism is thought to be due to its direct vasoconstricting effect on local blood vessels and the resultant decreased skin perfusion. Prolonged use can lead to decreased perfusion and impaired wound healing, leading to higher chances of infection of these ulcers.