Currently is nauseated, has double vision, is seeing bugs crawling all over the ceiling.
 History of substance abuse
(ROOT (S (S (NP (NNP Currently)) (VP (VBZ is) (ADJP (JJ nauseated)))) (, ,) (VP (VP (VBZ has) (NP (JJ double) (NN vision))) (, ,) (VP (VBZ is) (VP (VBG seeing) (NP (NP (NNS bugs)) (VP (VBG crawling) (ADVP (DT all)) (PP (IN over) (NP (DT the) (NN ceiling)))))))) (. .)))
(ROOT (NP (NP (NN History)) (PP (IN of) (NP (NN substance) (NN abuse)))))
( ( Currently ( is nauseated ) ) ( , ( ( ( ( has ( double vision ) ) , ) ( is ( seeing ( bugs ( ( crawling all ) ( over ( the ceiling ) ) ) ) ) ) ) . ) ) )
( History ( of ( substance abuse ) ) )