USP Octinoxate RS
[octyl methoxycinnamate] —Do not dry.Keep container tightly closed.Store in a cool place.Protect from light.
USP Octisalate RS[octyl salicylate].

USP Octocrylene RS—
Do not dry.After opening ampul,store in a tightly closed container.
USP Octoxynol 9RS
Do not dry before using.Keep container tightly closed.
USP Octyldodecanol RS
Do not dry before using.Keep container tightly closed.
USP Ofloxacin RS
Do not dry before using.Keep container tightly closed and protected from light.
USP Omeprazole RS
Do not dry before using.Keep container tightly closed,and store in a cold place,protected from moisture.
USP Ondansetron Hydrochloride RS—
Do not dry.For quantitative applications,determine the water content titrimetrically at the time of use.Keep container tightly closed.Protect from light.
USP Ondansetron Related Compound A RS
[3[(dimethylamino)methyl]-1,2,3,9-tetrahydro-9-methyl-4H-carbazol-4-one] —Do not dry.Keep container tightly closed.Protect from light.
USP Ondansetron Related Compound B RS
[6,6¢-methylene bis-[(1,2,3,9-tetrahydro-9-methyl-3-[(2-methyl-1H-imidazol-1-yl)-methyl]-4H-carbazol-4-one] .
USP Ondansetron Related Compound C RS
[1,2,3,9-tetrahydro-9-methyl-4H-carbazol-4-one] —Do not dry.Keep container tightly closed.Store in a refrigerator.
USP Ondansetron Related Compound D RS
[1,2,3,9-tetrahydro-9-methyl-3-methylene-4H-carbazol-4-one] —Do not dry.Keep container tightly closed.Protect from light.Store in a refrigerator.
USP Orphenadrine Citrate RS
Dry portion at 105for 3hours before using.Keep container tightly closed.Protect from light.
USP Oxacillin Sodium RS
Do not dry before using.Keep container tightly closed.Store at a controlled room temperature.
USP Oxandrolone RS
Dry portion at 105for 3hours before using.Keep container tightly closed.Protect from light.
USP Oxaprozin RS—
Dry portion over silica gel at room temperature for 24hours before using.Keep container tightly closed.Protect from light.
USP Oxazepam RS
Dry portion at a pressure below 5mm of mercury at 105for 3hours before using.Keep container tightly closed.
USP Oxfendazole RS—
Do not dry.Keep container tightly closed.Protect from light.
USP Oxprenolol Hydrochloride RS—
Do not dry.Keep container tightly closed.Protect from light.
USP Oxtriphylline RS
Dry portion at 80for 4hours before using.Keep container tightly closed.Protect from light.
USP Oxybenzone RS
Dry portion in vacuum at 40for 2hours before using.Keep container tightly closed.Protect from light.
USP Oxybutynin Chloride RS
Dry portion in vacuum at 60for 24hours before using.Keep container tightly closed.
USP Oxybutynin Related Compound A RS[phenylcyclohexylglycolic acid]
(C14H18O3 234.30) —Dry portion at 105for 2hours.Keep container tightly closed.Store in a dry place.
USP Oxycodone RS
Dry portion at 105for 4hours before using.Keep container tightly closed.
USP Oxymetazoline Hydrochloride RS—
Do not dry.Keep container tightly closed.
USP Oxymetholone RS
Dry portion in vacuum over phosphorus pentoxide for 4hours before using.Keep container tightly closed.
USP Oxymorphone RS
Do not dry before using.Keep container tightly closed and protected from light.
USP Oxyquinoline Sulfate RS
Do not dry.Keep container tightly closed.
USP Oxytetracycline RS
Do not dry.Keep container tightly closed.Protect from light.Store in a cold place.
USP Oxytocin RS
Store at or below 0.Reconstitute the entire content of one vial in water,quantitatively transfer with water to a 5-mLvolumetric flask,dilute with water to volume,and mix.For the System suitability test spike a portion of the final solution with chlorobutanol.