The patient has a [** Location **]us history of overdose on Dextromethorphan requiring hospitalization.
 The patient has substance abuse disorder. 
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (DT a) (-LRB- -LSB-) (SYM **) (NNP Location) (X (SYM **)) (-RRB- -RSB-) (PRN (S (NP (PRP us)) (NP (NP (NN history)) (PP (IN of) (NP (NN overdose))) (PP (IN on) (NP (NP (NNP Dextromethorphan)) (VP (VBG requiring) (NP (NN hospitalization)))))))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (NN substance) (NN abuse) (NN disorder))) (. .)))
( ( The patient ) ( ( has ( a ( -LSB- ( ** ( ( ( Location ** ) -RSB- ) ( us ( ( history ( of overdose ) ) ( on ( Dextromethorphan ( requiring hospitalization ) ) ) ) ) ) ) ) ) ) . ) )
( ( The patient ) ( ( has ( substance ( abuse disorder ) ) ) . ) )