might be with a large dose of painkillers 
(ROOT (S (VP (MD might) (VP (VB be) (PP (IN with) (NP (NP (DT a) (JJ large) (NN dose)) (PP (IN of) (NP (NNS painkillers)))))))))
(ROOT (S (VP (MD ) (VP (VB ) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NNS )))))))))