The patient has a [** Location **]us history of overdose on Dextromethorphan requiring hospitalization.
 The patient overdosed on cough medicine. 
(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 (VBD overdosed) (PP (IN on) (NP (NN cough) (NN medicine)))) (. .)))
( ( The patient ) ( ( has ( a ( -LSB- ( ** ( ( ( Location ** ) -RSB- ) ( us ( ( history ( of overdose ) ) ( on ( Dextromethorphan ( requiring hospitalization ) ) ) ) ) ) ) ) ) ) . ) )
( ( The patient ) ( ( overdosed ( on ( cough medicine ) ) ) . ) )