Answers are grounded in this paper and cite their sources.
Elliott R. Jacobson, George V. Kollias, Darryl J. Heard, Randolph Caligiuri, Immobilization of African Elephants with Carfentanil and Antagonism with Nalmefene and Diprenorphine, The Journal of Zoo Animal Medicine, Vol. 19, No. 1/2 (Mar. - Jun., 1988), pp. 1-7
No takes yet. Share an insight, caveat, or question.
Jacobson et al. (1988) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: