drug withdrawal 6 human 6 Humans 4 adult 4 arthralgia 4 clinical trial 4 dizziness 4 major clinical study 4 unclassified drug 4 17 phenyl 5alpha androst 16 en 3alpha ol 2 17alpha aza d homosteroid derivative 2 17beta alkynyl derivative 2 17beta carbonitrile 2 2 isopropylmorpholine derivative 2 22 bromoalkynyl derivative 2 3alpha amino 5alpha pregan 20 one 2 3alpha hydroxy 3beta trifluoromethyl 19 nor 5beta pregnan 20 one 2 3alpha hydroxy 5alpha pregnan 20 one 2 3alpha,21 dihydroxy 5 alpha pregnan 20 one 2 3beta carboxamidomethyl 2 3beta hydroxymethyl 2 3beta methyl derivative 2 4 aminobutyric acid A receptor 2 4 aminobutyric acid receptor 2 Animals 2 Anticonvulsant 2 Argentina 2 Article 2 Chagas Disease 2 Chagas disease 2