(S (S (ADVP (RB However)) (COMMA ,) (S (BASENP (DT the) (NNP FDA)) (VP (VP (VP (VBD had) (RB not)) (VP (VP (VBN considered) (NP (NP (JJ similar) (QT (DQL ``) (BASENP (JJ potential) (JJ behavioral) (NNS implications)) (DQR ''))) (PP (IN for) (BASENP (JJR younger) (NNS users))))) (PP (IN for) (BASENP (JJ other) (NNS OTC-switches))))) (CC and) (VP (VBD had) (VP (ADVP (RB previously)) (VP (VBN considered) (S (S (BASENP (PRP it)) (ADJP (JJ appropriate))) (S (VP (TO to) (VP (VP (VP (VB extrapolate) (BASENP (NNS data))) (PP (IN from) (BASENP (JJR older)))) (PP (TO to) (BASENP (JJR younger) (NNS audiences))))))))))))) (PERIOD .))