"tranquillizer" translation into Spanish

EN

"tranquillizer" in Spanish

EN tranquillizer
volume_up
{noun}

1. general

tranquillizer (also: tranquilizer, anxiolytic)

2. British English

tranquillizer (also: sedative, tranquilizer, bromide, downer)
tranquillizer
As well as that, there was a rhino that tried to escape and was shot without using a tranquillizer to minimize the pain; that has also not been explained.
Además, hubo un rinoceronte que intentó escapar y fue abatido sin aplicarle un tranquilizante para reducir el dolor; eso tampoco se ha explicado.