Oxybutynin hydrochloride

Oxybutynin impurity A - 4-(diethylamino)but-2-ynyl(RS)-2-(cyclohex-3-enyl)-2-cyclohexyl-2-hydroxyacetate

Oxycodone impurity D - 7,8-didehydro-4,5 alpha-epoxy-14-hydroxy-3-methoxy-17- methylmorphinan-6-one (14-hydroxycodeinone)

Oxymetazoline hydrochloride

Oxymetazoline impurity A - N-(2-aminoethyl)-2-[4-(1,1-dimethylethyl)-3-hydroxy-2,6-dimethylphenyl]acetamide

Oxytetracycline

Oxytetracycline for system suitability

Oxytetracycline hydrochloride

Oxytocin

Oxytocin/Desmopressin validation mixture about 0.1 mg oxytocin + 0.1 mg desmopressin per vial (20 mg)