USP Paclitaxel RS—
Do not dry. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP Paclitaxel Related Compound A RS
[cephalomannine]
—Do not dry. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP Paclitaxel Related Compound B RS
[10-deacetyl-7-epipaclitaxel]
—Do not dry. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP Padimate O RS—
Do not dry; determine the water content titrimetrically, for quantitative application, at the time of use. Keep container tightly closed. Protect from light.
USP Palmitic Acid RS—
Do not dry. Store in a refrigerator. Keep container tightly closed.
USP Pamoic Acid RS
(C
23H
16O
6 
388.38)
—Dry portion in vacuum at 100
for 3 hours before using. Keep container tightly closed.
USP Pancreatin Amylase and Protease RS—
Keep container tightly closed, and store in a refrigerator. Do not open while cold, and do not dry before using.
USP Pancreatin Lipase RS—
Keep container tightly closed, and store in a refrigerator. Do not open while cold, and do not dry before using.
USP Pancuronium Bromide RS
[3
,17
-dihydroxy-2
,16
-dipiperidinyl-5
-androstane, 3,17-diacetate, dimethobromide
]
(C
35H
60Br
2N
2O
4
732.67).
USP Racemic Panthenol RS—
Do not dry. Keep container tightly closed.
USP Pantolactone RS—
Do not dry. Keep container tightly closed. Protect from light.
USP Papain RS—
Do not dry before using. Keep container tightly closed, protected from light, and store in a refrigerator. Do not open while cold.
USP Papaverine Hydrochloride RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed. Protect from light.
USP Paramethasone Acetate RS—
Dry portion in vacuum at 105
for 4 hours before using. Keep container tightly closed.
USP Parbendazole RS—
Do not dry before using. Keep container tightly closed. Store in a refrigerator.
USP Paricalcitol RS.
USP Paricalcitol Solution RS.
USP Paromomycin Sulfate RS—
Dry portion in vacuum at a pressure not exceeding 5 mm of mercury at 60
for 3 hours before using. Keep container tightly closed. Protect from light. Store in a cold place.
USP Paroxetine Hydrochloride RS—
Do not dry. This is the hemihydrate form of Paroxetine Hydrochloride. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP Paroxetine Related Compound A RS
[trans-4-(p-methoxyphenyl)-3-[(3,4-methylenedioxy)phenoxy]methylpiperidine hydrochloride]
—Do not dry before use. Keep container tightly closed. Protect from light.
USP Paroxetine Related Compound B RS
[trans-4-phenyl-3-[(3,4-methylenedioxy)phenoxy]methylpiperidine hydrochloride]
—Do not dry. This is a hydrochloride salt. Keep container tightly closed. Protect from light.
USP Paroxetine Related Compound C RS
[(+)-trans-paroxetine hydrochloride]
—Do not dry before use. Keep container tightly closed. Protect from light.
Delete the following:
USP Paroxetine Related Compound D RS
[cis-paroxetine hydrochloride
]
—Do not dry. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP29
USP Paroxetine Related Compound E Mixture RS
(paroxetine hydrochloride spiked with 1-methyl-4-(p-fluorophenyl)-1,2,3,6-tetrahydropyridine)
—Do not dry. Keep container tightly closed. Protect from light.
USP Paroxetine Related Compound F RS
[trans(–)-1-methyl-3-[1,3-benzodioxol-5-yloxy)methyl]-4-(fluorophenyl)piperidine
]
(C
20H
22FNO
3
343.39)
—Do not dry. Keep container tightly closed. Protect from light.
USP Paroxetine Related Compound G RS
[(±)
trans-3-[(1,3-benzodioxol-5-yloxy)methyl]-4-(4
¢¢-fluorophenyl-4
¢-phenyl)piperidine hydrochloride
]
(C
25H
24FNO
3
405.46)
—Do not dry. Keep container tightly closed. Protect from light.
Add the following:
USP Paroxetine Hydrochloride for System Suitability RS
—Mixture of 1% paroxetine related compound A
[piperidine, 3-[(1,3-benzodioxol-5-yloxy)methyl]-4-(4-methoxyphenyl)-, hydrochloride (3
S-trans); and 1% of paroxetine related compound B [piperidine, 3-[(1,3-benzodioxol-5-yloxy)methyl]-4-phenyl)-, hydrochloride (3
S-trans)]
] in a matrix of paroxetine hydrochloride.
USP Parthenolide RS—
Do not dry before using. Keep container tightly closed. Protect from light. Store in a freezer.
USP Particle Count RS (2 blanks and 2 suspensions)—
The set consists of 2 vials containing a suspension of 15-µm polystyrene spheres and 2 vials containing the aqueous phase without particles (the blank). Particles must be resuspended before use. Do not open until ready to begin the test as set forth in chapter
Particulate Matter in Injections 
788
. Store in a cool place.
PROTECT FROM FREEZING.
USP Penbutolol Sulfate RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed and protected from light.
USP Penicillamine RS
—Do not dry. Keep container tightly closed, protected from light, and store in a cold place.
USP Penicillamine Disulfide RS
(C10H20N2O4S2)
—Do not dry before using. Keep container tightly closed.
USP Penicillin G Benzathine RS—
Do not dry before using. Keep container tightly closed. Protect from light. Store in a cold place.
USP Penicillin G Potassium RS—
Do not dry before using. Keep container tightly closed. Protect from light. Store in a cold place.
USP Penicillin G Procaine RS—
Do not dry. This is the monohydrate form of Penicillin G Procaine. Keep container tightly closed. Store in a refrigerator.
USP Penicillin G Sodium RS—
Dry portion in vacuum at 60
for 3 hours. Keep container tightly closed. Store in a refrigerator.
USP Penicillin V RS—
Do not dry before using. Keep container tightly closed.
USP Penicillin V Potassium RS—
Do not dry before using. Keep container tightly closed. Protect from light. Store in a cold place.
USP Pentazocine RS—
Dry portion at 60
and at a pressure not exceeding 5 mm of mercury to constant weight before using. Keep container tightly closed. Protect from light.
USP Pentetic Acid RS—
Do not dry before using. Keep container tightly closed.
USP Pentobarbital RS—
Do not dry. Keep container tightly closed.
USP Pentoxifylline RS—
Dry portion in vacuum at a pressure not exceeding 5 mm of mercury at 60
for 3 hours before using.
USP Perflubron RS—
Do not dry. After opening ampul, store in a tightly closed container. Protect from light.
USP Pergolide Mesylate RS—
Do not dry.
USP Pergolide Sulfoxide RS
[(8
)-8-[(methylsulfinyl)methyl]-6-propyl-
D-ergoline
]
—Do not dry.
USP Perphenazine RS—
Dry portion in vacuum at 65
for 3 hours before using. Keep container tightly closed. Protect from light.
USP Perphenazine Sulfoxide RS—
Do not dry. Keep container tightly closed. Protect from light.
USP Phenacetin Melting Point RS—
Dry portion over silica gel for 16 hours before using. When melted by the USP capillary tube method,
Class Ia in the general chapter
Melting Range or Temperature 741, the observed range falls within the indicated acceptance range. Keep container tightly closed.
USP Phenazopyridine Hydrochloride RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed.
USP Phendimetrazine Tartrate RS—
Dry portion at 105
to constant weight before using. Keep container tightly closed.
USP Phenelzine Sulfate RS—
Dry portion at a pressure not exceeding 5 mm of mercury over silica gel at 80
for 2 hours before using. Keep container tightly closed. Protect from light and heat.
USP Pheniramine Maleate RS—
Dry portion in vacuum at 65
for 6 hours before using. Keep container tightly closed.
USP Phenmetrazine Hydrochloride RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed.
USP Phenobarbital RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed.
Add the following:
USP Phenol RS.
USP29
USP Phenoxybenzamine Hydrochloride RS—
Dry portion in vacuum at 60
for 2 hours before using. Keep container tightly closed.
USP Phenoxyethanol RS
[2-phenoxyethanol]—
Do not dry. Keep container tightly closed. Protect from light.
USP Phensuximide RS—
Dry portion in vacuum at 50
for 4 hours before using. Keep container tightly closed.
USP Phentermine Hydrochloride RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed.
USP Phentolamine Mesylate RS—
Dry portion in vacuum at 60
for 4 hours before using. Keep container tightly closed. Protect from light.
USP L-Phenylalanine RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed.
USP Phenylbutazone RS—
Dry portion in vacuum at a pressure of 30 ± 10 mm of mercury at 80
for 4 hours before using. Keep container tightly closed.
USP Phenylephrine Hydrochloride RS—
Do not dry. Keep container tightly closed. Protect from light.
USP Phenylethyl Alcohol RS—
Do not dry. After opening ampul, store in a tightly closed container.
USP 5-Phenylhydantoin RS—
Do not dry before using. Keep container tightly closed.
USP Phenylpropanediol RS
[1-phenyl-1,2-propanediol
]
(C
9H
12 O
2
152.19)
—Do not dry. Keep container tightly closed and protected from light.
USP Phenylpropanolamine Bitartrate RS—
Dry portion at 65
for 3 hours before using. Keep container tightly closed and protected from light.
USP Phenylpropanolamine Hydrochloride RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed. Protect from light.
USP Phenyltoloxamine Citrate RS—
Dry it in vacuum at 80
for 3 hours. Keep the container tightly closed. Protect from light.
USP Phenyltoloxamine Related Compound A RS
[2-(2-benzylphenoxy)ethylmethylamine hydrochloride
]
(C
16H
19NO·HCl
277.79)
—Do not dry. Keep the container tightly closed. Protect from light.
Change to read:
USP Phenytoin RS—
Do not dry.
USP29 Keep container tightly closed.
USP Phenytoin Related Compound A RS
[diphenylglycine
]
(C
14H
15NO
2
227.26)
—Do not dry. Keep container tightly closed. Protect from light.
USP Phenytoin Related Compound B RS
[diphenylhydantoic acid
]
(C
15H
14N
2O
3
270.29)
—Do not dry. Keep container tightly closed. Protect from light.
USP Phenytoin Sodium RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed.
USP Cultured Rat Pheochromocytoma Reference Photomicrographs VRS.
USP Phosphated Riboflavin RS—
Dry portion at 105
for 2 hours. Keep container tightly closed.
USP Physostigmine Salicylate RS—
Do not dry. Keep container tightly closed. Protect from light.
USP Phytonadione RS—
This material decomposes on exposure to sunlight. Do not dry before using. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP Pilocarpine RS—
Do not dry. Allow ampul to equilibrate to room temperature before opening.
USP Pilocarpine Hydrochloride RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP Pilocarpine Nitrate RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed. Protect from light.
USP Pimozide RS—
Dry portion in vacuum at 80
for 4 hours before using. Keep container tightly closed. Protect from light.
USP Pindolol RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed. Protect from light.
USP Piperacillin RS—
Do not dry. For quantitative applications determine the water content at the time of use. Keep container tightly closed, and store in a cold, dry place, protected from light.
USP Piroxicam RS—
Do not dry before using. Keep container tightly closed. Protect from light.
USP Plicamycin RS—
Dry portion in vacuum at a pressure not exceeding 5 mm of mercury at 25
for 4 hours before using. Keep container tightly closed. Protect from light. Store in a cold place.
USP Polacrilex Resin RS—
Do not dry before using. Keep container tightly closed.
USP Polacrilin Potassium RS—
Dry portion at 105
for 6 hours before using. Keep container tightly closed.
USP Poloxalene RS—
Do not dry. Keep container tightly closed. Protect from light. Store in a cool place.
USP Polydimethylsiloxane RS—
Do not dry before using. After opening ampul, store in a tightly closed container.
USP High-Density Polyethylene RS—
[NOTE—Exercise care in handling and storage to avoid scratching the smooth surfaces of the strips.] Prepare samples as directed in the respective USP General Tests Chapters. Do not dry.
USP Polyethylene Oxide RS—
Dry portion in vacuum at room temperature to constant weight before using. Keep container tightly closed. Protect from light.
USP Low-Density Polyethylene RS—
[NOTE—Exercise care in handling and storage to avoid scratching smooth surfaces of strips.] Cut segments to dimensions necessary for mounting in holders used for reflectance spectrum determinations. Prepare samples for thermal analysis from remaining portions of strips. Do not dry.
USP Polyethylene Terephthalate RS—
[NOTE—Exercise care in handling and storage to avoid scratching smooth surfaces of strips.] Cut segments to dimensions necessary for mounting in holders used for reflectance spectrum determinations. Prepare samples for thermal analysis from remaining portions of strips. Do not dry.
USP Polyethylene Terephthalate G RS—
[NOTE—Exercise care in handling and storage to avoid scratching smooth surfaces of strips.] Cut segments to dimensions necessary for mounting in holders used for reflectance spectrum determinations. Prepare samples for thermal analysis from remaining portions of strips. Do not dry.
USP Polyisobutylene RS.
USP Polymyxin B Sulfate RS—
Dry portion in vacuum at a pressure not exceeding 5 mm of mercury at 60
for 3 hours before using. Keep container tightly closed. Protect from light. Store in a cold place.
USP Polyoxyl 20 Cetostearyl Ether RS.
USP Polyoxyl 10 Oleyl Ether RS.
USP Polyoxyl 10 Stearyl Ether RS.
Add the following:
USP Polyoxyl 35 Castor Oil RS.
USP29
USP Polyoxyl 40 Stearate RS—
Do not dry before using. Keep container tightly closed.
USP Polyoxyl Lauryl Ether RS.
USP Polyoxyl Oleate RS.
USP Posterior Pituitary RS—
Do not dry before using. Store at a temperature of 0
or below. Each mg represents 2.4 USP Posterior Pituitary Units of oxytocic activity and 2.1 USP Posterior Pituitary Units of vasopressor activity. Do not freeze.
USP Potassium Gluconate RS—
Dry portion in vacuum at 105
for 4 hours before using. Keep container tightly closed.
USP Potassium Guaiacolsulfonate RS—
Do not dry. Determine the water content titrimetrically before use for quantitative analyses. Keep container tightly closed. Protect from light.
USP Potassium Perchlorate RS.
USP Potassium Sucrose Octasulfate RS [NOTE—Sucrosofate Potassium is USAN]
[-
D-glucopyranoside, 1,3,4,6-tetra-
O-sulfo-
-
D-fructofuranosyl, tetrakis (hydrogen sulfate), octapotassium salt, heptahydrate
]
(C
12H
14K
8O
35S
8·7H
2O
1413.64
CAS-76578-81-9).
(anhydrous C
12H
14K
8O
35S
8
1287.53
CAS-73264-44-5)
—Do not dry; determine the water content titrimetrically when used for quantitative analyses. Keep container tightly closed, and store in a freezer. Allow to equilibrate to ambient temperature before opening.
USP Potassium Trichloroammineplatinate RS
(Cl
3H
3KNPt
357.58)
—Dry portion in vacuum at room temperature over phosphorus pentoxide in a desiccator for 20 hours before use. Keep container tightly closed.
USP Pralidoxime Chloride RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed.
USP Pramoxine Hydrochloride RS—
Dry portion at 105
for 1 hour before using. Keep container tightly closed.
USP Praziquantel RS—
Dry portion in vacuum at a pressure not exceeding 5 mm of mercury at 50
over phosphorus pentoxide for 2 hours before using. Keep container tightly closed. Protect from light.
USP Praziquantel Related Compound A RS
[2-benzoyl-1,2,3,6,7,11b-hexahydro-4
H-pyrazino [2,1-
a]isoquinolin-4-one
]
(C
19H
18N
2O
2
306.37)
—Dry portion in vacuum at a pressure not exceeding 5 mm of mercury at 50
over phosphorus pentoxide for 2 hours before using. Keep container tightly closed. Protect from light.
USP Praziquantel Related Compound B RS
[2-(cyclohexylcarbonyl)-2,3,6,7-tetrahydro-4
H-pyrazino [2,1-
a]isoquinolin-4-one
]
(C
19H
22N
2O
2
310.40)
—Dry portion in vacuum at a pressure not exceeding 5 mm of mercury at 50
over phosphorus pentoxide for 2 hours before using. Keep container tightly closed. Protect from light.
USP Praziquantel Related Compound C RS
[2-(
N-formylhexahydrohippuroyl-1,2,3,4-tetrahydroisoquinolin-1-one
]
(C
19H
22N
2O
4
342.39)
—Dry portion in vacuum at a pressure not exceeding 5 mm of mercury at 50
over phosphorus pentoxide for 2 hours before using. Keep container tightly closed. Protect from light.
USP Prazosin Hydrochloride RS—
Do not dry; determine the water content titrimetrically at the time of use. Keep container tightly closed. Protect from light.
USP Prednisolone RS—
This is the anhydrous form. Dry portion in vacuum at 105
for 3 hours before using. Keep container tightly closed. Protect from light.
USP Prednisolone Acetate RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed.
USP Prednisolone Hemisuccinate RS—
Dry portion in vacuum at 65
for 3 hours before using. Keep container tightly closed.
USP Prednisolone Tebutate RS—
Dry portion in vacuum at a pressure of not more than 5 mm of mercury at 105
for 4 hours before using. Keep container tightly closed.
USP Prednisone RS—
Do not dry. Keep container tightly closed.
USP Prednisone Tablets RS (Dissolution Calibrator, Disintegrating)—
The label states the nominal weight of prednisone in each tablet. Use only whole tablets. Remove any surface dust with a soft brush before using. Keep container tightly closed. Store in a desiccator or in a dry place at room temperature.
USP Prilocaine Hydrochloride RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed.
USP Prilocaine RS.
USP Prilocaine Related Compound A RS
[o-toluidine hydrochloride
]
(CH
3C
6H
4NH
2HCl
143.62
CAS-636-21-5)
—Do not dry. Keep container tightly closed. Protect from light.
USP Prilocaine Related Compound B RS
[(
RS)-
N-(4-methylphenyl)-2-(propylamino)propanamide
]
(C
13H
20N
2O
220.31)
—Do not dry. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP Primaquine Phosphate RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed.
USP Primidone RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed.
USP Probenecid RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed.
USP Probucol RS—
Dry portion in a vacuum at 80
for 1 hour before using. Keep container tightly closed. Protect from light.
USP Probucol Related Compound A RS
[2,2
¢,6,6
¢-tetra-
tert-butyldiphenoquinone
]
(C
28H
40O
2
408.63)
—Do not dry. Keep container tightly closed. Protect from light.
USP Probucol Related Compound B RS
[4,4
¢-(dithio)bis(2,6-di-
tert-butylphenol)
]
(C
28H
42O
2
474.78)
—Do not dry. Keep container tightly closed. Protect from light.
USP Probucol Related Compound C RS
[4-[(3,5-di-
tert-butyl-2-hydroxyphenylthio)isopropylidenethio]-2,6-di-
tert-butylphenol
]
(C
31H
48O
2S
2
516.86)
—Do not dry. Keep container tightly closed. Protect from light.
USP Procainamide Hydrochloride RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed. Material is hygroscopic.
USP Procaine Hydrochloride RS—
Dry portion over silica gel for 18 hours before using. Keep container tightly closed.
USP Procarbazine Hydrochloride RS—
Keep container tightly closed. Protect from light. Store in a cool place.
USP Prochlorperazine Maleate RS—
Dry portion in vacuum at 60
for 2 hours before using. Keep container tightly closed. Protect from light.
USP Procyclidine Hydrochloride RS—
Dry portion in vacuum at 105
for 4 hours before using. Keep container tightly closed. Protect from light.
USP Progesterone RS—
Do not dry. Keep container tightly closed. Protect from light.
USP Proinsulin (Beef) RS.
USP Proinsulin (Pork) RS.
USP L-Proline RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed.
USP Promazine Hydrochloride RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed. Protect from light.
USP Promethazine Hydrochloride RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed. Protect from light.
USP Propafenone Hydrochloride RS—
Do not dry. Keep container tightly closed. Protect from light.
USP Propantheline Bromide RS—
Dry portion at 105
for 4 hours before using. Store under inert gas, and keep container tightly closed.
USP Propantheline Bromide Related Compound A RS [9-hydroxypropantheline bromide]
(C
23H
30BrNO
4
464.39)
—Do not dry. Keep container tightly closed. Avoid contact. Store in a desiccator. Protect from light. Store under inert atmosphere.
USP Proparacaine Hydrochloride RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed.
Change to read:
USP Propofol RS—
Do not dry. After opening, keep in tight, light-resistant containers under inert gas.
USP29
Change to read:
USP Propofol Related Compound A RS
[3,3
¢-5,5
¢-tetraisopropyldiphenol
]
—
Do not dry. Store in a refrigerator. Protect from light.
USP29
Change to read:
USP Propofol Related Compound B RS
[2,6-diisopropylbenzoquinone
]
—
Do not dry. Keep in tight, light-resistant containers under inert gas. Store in a refrigerator.
USP29
USP Propofol Related Compound C RS
[2,6-diisopropylphenylisopropyl ether
]
(C
14H22O
206.32)
—Do not dry. Protect from light. Store in a refrigerator.
USP Propofol Resolution Mixture RS [propofol and 2-isopropyl-6-n-propylphenol].
USP Propoxycaine Hydrochloride RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed. Protect from light.
USP Propoxyphene Hydrochloride RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed.
USP Propoxyphene Napsylate RS—
This is the monohydrate form. Do not dry; determine the water content titrimetrically at time of use for quantitative analyses. Keep container tightly closed.
USP Propoxyphene Related Compound A RS
[a-d-4-dimethylamino-1,2-diphenyl-3-methyl-2-butanol hydrochloride
]
(C
19H
25NO·HCl
319.87)
—Do not dry before using. Keep container tightly closed and protected from light.
USP Propoxyphene Related Compound B RS [-d-2-Acetoxy-4-dimethylamino-1,2-diphenyl-3-methylbutane]
(C
21H
27NO
2
325.45)
—Do not dry before using. Keep container tightly closed and protected from light.
USP Propranolol Hydrochloride RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed.
USP Propylene Carbonate RS—
Do not dry before using. Keep container tightly closed.
USP Propylene Glycol RS—
Do not dry before using. After opening ampul, transfer to a tightly closed container.
Add the following:
USP Propylene Glycol Dilaurate RS.
USP29
Add the following:
USP Propylene Glycol Monolaurate RS.
USP29
USP Propyl Gallate RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed. Protect from light, and avoid contact with metals.
Change to read:
USP Propylparaben RS—
Do not dry.
USP29 Keep container tightly closed.
USP Propylthiouracil RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed. Protect from light.
USP Prostaglandin A1 RS—
Do not dry before using. Keep container tightly closed. Store in a freezer.
USP Prostaglandin B1 RS
(C
20H
32O
4
336.47)
—Do not dry before using. Keep container tightly closed, and store in a freezer.
USP Protriptyline Hydrochloride RS—
Dry portion at a pressure below 5 mm of mercury at 60
to constant weight before using. Keep container tightly closed.
USP Pseudoephedrine Hydrochloride RS—
Dry portion at 105
for 3 hours before using. Keep container tightly closed. Protect from light.
USP Pseudoephedrine Sulfate RS—
Dry portion at 105
for 2 hours before using. Keep container tightly closed. Protect from light.
USP Pyrantel Pamoate RS—
Dry portion in vacuum at 60
for 3 hours before using. Keep container tightly closed. Protect from light.
USP Pyrazinamide RS—
Dry portion over silica gel for 18 hours before using. Keep container tightly closed.
USP Pyrethrum Extract RS.
USP Pyridostigmine Bromide RS—
Dry portion in a suitable vacuum drying tube, using phosphorus pentoxide as the desiccant, at 100
for 4 hours before using. Keep container tightly closed, and store in a desiccator.
USP Pyridoxine Hydrochloride RS—
Dry portion in vacuum over silica gel for 4 hours before using. Keep container tightly closed. Protect from light.
USP Pyrilamine Maleate RS—
Do not dry. Keep container tightly closed. Protect from light.
USP Pyrimethamine RS—
Dry portion at 105
for 4 hours before using. Keep container tightly closed. Protect from light.
USP Pyrvinium Pamoate RS—
Do not dry; determine the water content titimetrically at time of use. Keep container tightly closed. Protect from light.
