Exam 1 Lecture flash cards
1 oz = ?grams
28.35 g
1 apothecary oz= ?grams
31.1 g
1 oz= ? ml
29.57 mL
1 apothecary oz= ?mL
29.57 mL
steps to refining
weight out approximate amount needed to fill prescription, (round to nearest whole number,), and place in Wedgewood mortar and pestle. After refining, weigh out exact amount needed to fill prescription.
things to always add to prescription (from top to bottom
- media prescription was dispensed in
- expiration date of prescription
- endorsed prescription with initials and date it was filled
- interrelated sig
- axillary label
geometric combineination/ trituration
indicated when mass of powders to be mixed differ by a factor greater than 3. first take the ingredient with the smallest mass and place it in the mortar. next add in approx equal amount of powder with the larger quantitiy into the mortar. once we have approx equal quantities, we can triturate the powders. next add another quantity of the largr mass of pwder into the morater and triturate. repeat until the mass of the 2 powders differ than less than a factor of 3.
compounding
physical and /or chemical modification of a substance resulting in a drug/dosage form to which is suitable for administration to a patient
reasons for compounding:
drug or dosage form not commercially available.
patient comfort and compliance
what is extemporaneous compounding
pursuant to:
doesnt apply to
short period of time.
compounding pursuant to a specific patient, specific precription, and for 1 dispensing of a med
does not apply to : batching, maufacturing, refills
batching
compounding ahead of time in anticipation of outstanding refills or unfilled oral rx’s
compounding to have less than a 30 day supply
when batching, must keep records include
manu name
lot numers
expiration date
manufacturing
compounding for long term inventory and sale
stability
extent to which a drug preparation remains within specified limits in terms of chemical composition, physical composition, microbiologic activity/ contamination
expiration date:
what two factors control it?
rules of picking exp date
stability and storage conditions
dont pick an exp date that is longer than max dose interval, and dont pick pick exp date shorter than dose period for 1 filling
room temperature readings
20C-25 C
refrigerated temperature readings
2c-4c
what is an inactive ingredient?
substances present in a formulation which exist solely for their effect on the product
trituration
mixing of powders
what powders usually need to be pre-refined and in what instrument
salycylic acid
calamine
zinc oxide
sulfur ppt
wedgewood mortar
policy for making capsule
calculate mass needed to create +1 extra dose to account for possible loss when transferring contents
how to determine capsule size
convert capsule content mass to grains;
15.43 grains/1 g or 1000 mg=xgrains/ capsule content mass
subtract that number from 7 to get capsule size
what are powders:
intimate mixtures of dry, finely divided drugs and or chemicals that may be intended for internal or external use
types of powder
bulk powders (external use) unit dose powder (internal: capsules and chart powders. external : antimicrobial otic powders)
pulverization
particle size reduction for large particles
can be mechanical with mortar and pestly or by intervention by allowing substance to dissolve in suitable solvent
refinement
to make particle size smaller
purification
to make pure
efflorescent powders
contains water of hydration. store these in a cool dry place and in an air tight container
hygroscopic powders
subject to mooisturization from ambient humidity
deliquescent powders
hygroscopic but will actually dissolve forming an h2o solution