[Drug] etorphine [Delta (d)] Agonist [Kappa (k)] Agonist [Mu (m)] 
Agonist
A n t a g o n i s t
A g o n i s t
W e a k A g o n i s t
P a r t i a l A g o n i s t
A n t a g o n i s t o r P a r t i a l A g o n i s t