Ratio Compounds
Given the following information, calculate the amount of each ingredient required to make the compound:
Canesten cr:Betaderm 0.1% cr:Vaseline 1:2:4
Apply bid.
M: 60 g Answer up to two decimal places
Canesten cr:
Betaderm 0.1% cream:
Vaseline
1/7 x 60 grams = 8.57 g = Canesten
2/7 x 60 grams = 17.14 g = betaderm
4/7 x 60 grams = 34.29 g = vaseline
Given the following information, calculate the amount of each ingredient required to make the compound:
Diclofenac 4% in PLO gel
(PLO gel - Part A:Part B 1:3)
tid prn
Mitte: 90 g (round to two decimal places)
Diclofenac powder? Part A? Part B?
0.04 x 90 g = 3.6 g = diclofenac powder
90 - 3.6 = 86.40 g total PLO gel
Part A (1 part) = 21.60 g
Part B (3 parts) = 64.80 g
Given the following information:
Ketoderm cr – 14 g
Bactroban ung – 10 g
Tarobase cr – 16 g
Apply qid.
M: iv oz.
Total amount:
Total amount = 120 g
Ketoderm = 14/40 = x/120 = 42 g
Bactroban ung = 10/40 = x/120 = 30 g
Tarobase cr = 16/40 = x/120 = 48 g
Given the following information, how many capsules are needed to make this compound if you use Clindamycin 300 mg capsules? enter as a whole number
Clindamycin 150 mg/5 mL
ss tsp qid 7/7
M: 90 mL
Answer as a whole number
150 mg/5 ml = x/ 1 ml = 30 mg
30 mg x 90 mL = 2700 mg
2700 mg/300 mg capsules = 9 capsules clindamycin
Given the following information, how much of each ingredient is required if the pharmacy needs to batch 8 fl. oz. of the compound?
Formula:
Menthol 0.8% w/v
Camphor 40 mg/mL
Eucalyptus 1:200 w/v
Mineral oil q.s. to 60 mL
Menthol? Camphor? Eucalyptus? round to two decimal places
8 fl. oz. = qs to 240 mls
0.008 x 240 mL = 1.92 g = menthol
40 mg/mL = xmg/240 mg = 9600 mg = 9.6 g= camphor
1/200 = x/240 = 1.2 g = eucalyptus
Given the following information, calculate the amount of each ingredient required to make the compound:
Nilstat cr/Cortate Cr/Vaseline 1:2:3
Apply sparingly to the affected area(s) daily as directed.
M: 4 oz. (answer up to two decimal places)
Nistat cr: ? Cortate cream? vaseline?
4 oz = 120 grams
1/6 x 120 = 20 g = nilstat cream
2/6 x 120 = 40 g = cortate
3/6 x 120 = 60 g = vaseline
Given the following information, calculate the amount of each ingredient required to make the compound: (round to two decimal places)
Diclofenac 8% in PLO gel
(PLO gel - Part A:Part B 1:3)
bid prn
Mitte: 140 g
Diclofenac powder? Part A? Part B?
0.08 x 140 g = 11.2 g= diclofenac powder
140 g - 11.2 g = 128.8 g PLO gel
Part A 128.8 divide by 4 = 32.2 g
Part B 32.2 g x 3 parts = 96.6 g
Gabapentin 1% gel
M: 120 g *using gabapentin 400 mg capsules*
Enter answer as a whole number
0.01 x 120 g = 1.2 g
1.2 g x 1000 = 1200 mg
1200 mg/400 mg capsules = 3 capsules
Given the following information, what is the final volume to q.s. to if the doctor ordered 11 fl. oz.?
Formula: Propanolol 10 mg/5 mL suspension
Propanolol 40 mg tablets – 6 tablets
Simple syrup – q.s. 120 mL
Convert doctors order to mL
1 fluid ounce = 30 mL
so 30 mL x 11 = 330 mL
Given the following information, how much of each ingredient is required if the pharmacy needs to batch 12 oz. of the compound?
Formula: APNO
Miconazole 2% w/w
Ibuprofen 30 mg/g
In Betaderm 0.1% ung/Fucidin ung 1:1
Miconazole? Ibuprofen? Betaderm? Fucidin? (round to two decimal places
12 oz = 360 g (12 x 30)
Miconazole = 0.02 x 360 g = 7.2 g
Ibuprofen = 30 mg/g = xmg/360 g = 10800 mg = 10.8 g
360 g - 7.2 g- 10.8 g = 342 g /2 =
171 g of betaderm /171 g fucidin
Given the following information, calculate the amount of each ingredient required to make the compound:
Lidocaine viscous 2%:Maalox:Benadryl 2:3:1
1 tbsp q6h prn
M: 240 mL
Lidocaine viscous 2%? Maalox? Benadryl?
3/6 x 240 mL = 120 mL = Maalox
1/6 x 240 mL = 40 mL = Benadryl
Given the following information, calculate the amount of each ingredient required to make the compound:
Diclofenac 12% in PLO gel
(PLO gel - Part A:Part B 1:3)
bid prn
Mitte: 220 g (round to two decimal places)
Diclofenac powder? Part A? Part B?
0.12 x 220 g = 26.4 g = diclofenac powder
220 g - 26.4 g = 193.6 PLO gel
Part A = 193.6/4 =48.4 g
Part B = 48.4 x 3 parts = 145.2 g
Given the following information, how much of each ingredient is needed to compound this prescription?
0.5% HC PW
M: iii oz.
0.5 % decimal place 0.5/100 =0.005 x 60 = 0.3 g hydrocortisone powder
Hydrocortisone (HC) = 0.3 g
Purified Water (PW): qs to 90 g = 89.7 g of water
Given the following information, how many tablets are needed to make this compound if you use Ranitidine 300 mg tablets? Enter answer as one decimal place
Ranitidine 75 mg/1 mL suspension
Give 0.5 -1 mL bid ud x 5/52.
75 mg = 1 mL
75 mg x 2 (bid) = 150 mg
150 mg x 35 days = 5250 mg
5250 mg/ 300 mg = 17.5 this is your answer for 1 decimal place
Given the following information, how much of each ingredient is required if the pharmacy needs to compound 12 oz. of the compound?
Formula:
Cyclobenzaprine 2% w/w
Diclofenac 1:50 w/w
Propylene glycol 2.5 mL/50 g
In TD cream
Cyclobenzaprine? diclofenac? propylene glycol? TD cream?
12 oz = 360 grams
cyclobenzaprine = 0.02 x 360 g = 7.2 g
diclofenac = 1/50 = x/360 g = 7.2 g
propylene glycol= 2.5 mL/50 g = xmL/360 g=18 mL
360 - 7.2 -7.2 - 18 = 327.6 grams TD cream
Given the following information:
Cortate cr – 15 g
Lamisil cr – 5 g
Glaxal cr – 15 g
Apply qid.
M: ii oz.
Total amount: ( round to two decimal places)
Total amount = 60 grams
cross multiply
5/35 = x/60 = 8.57 g = Lamisil cream
Diclofenac 3% in PLO gel (Part A: Part B = 1:3)
Mitte: 80 g
Round to two decimal places
Diclofenac powder? Part A? Part B?
0.03 x 80 g = 2.40 g
80 g - 2.40 = 77.60 g PLO gel
77.60/4 = 19.40 = Part A
Part B = 19.40 x 3 = 58.2 g
Given the following information, how many tablets are needed to make this compound if you use Cimetidine 300 mg tablets?
Cimetidine 5% cream
Apply to warts bid.
M:60 g
0.05 x 60 g= 3 grams of cimetidine
3 grams to mg = 3000 mg (multiply by 1000)
3000 mg/300 mg tablets = 10 tablets
Suspension: 250 mg/5mL
5 mL q8h x 10 days M:100 mL
How many number of capsules are needed?
250 mg/5 mL = 50 mg/1 mL
100 ml x 50 mg/ml = 5000 mg total
5000 mg/500 mg = 10 capsules
Round answers to the hundredths place if required.
A Pharmacy order vi fl oz of the following formula.
Calamine Powder 40g
Liquid Phenol 10mL
Zinc Oxide 6g
q.s. with distilled water to 100mL
How many grams of Calamine Powder are required to prepare this compound?
vi fl. oz. = 180 mL
40g/100 ml = xg/180 mL = 72 g of calamine powder
What is the total amount ? How much of each ingredient is needed?
Hydrocortisone cr - 10 g, Clotrimazole cr - 20g, Glaxal Base - 10 g M: iii oz ( round to two decimal places)
original total = 40 g cross multiply
Hydrocortisone = 10/40 = x/90 = 22.5 g
Clotrimazole Cr = 20/40 = x/90 = 45 g
Glaxal Base = 10/40 = x/90 = 22.5 g
How much of each ingredient is needed?
Round to two decimal places
Diclofenac 5 % in PLO gel (Part A: Part B = 1:3)
M: 150 g
Diclofenac powder? Part A? Part B?
0.05 x 150 g = 7.50 g diclofenac powder
150 g - 7.50 = 142.50 g PLO gel
142.50/4 = 35.63 g = Part A
35.63 x 3 parts = 106.88 = Part B
Metronidazole 2 % cream
M:45 g *using 250 mg tablets*
Enter answer as a whole number
0.02 x 45 = 0.9 g
0.9 g x 1000 = 900 mg
900 mg/ 250 mg = 3.6 tablets = 4 tablets
Clarithromycin 250 mg tablets
Clarithromycin 125 mg/5 mL
5 mL bid x 7 days
Prepare 35 mL
How many number of tablets are needed?
125 mg/5 mL = 25 mg/1 mL
35 mL x 25 mg/mL = 875 mg total
875 mg / 250 mg = 3.5 tablets - round up to 4 tablets
Clindamycin 2% w/v
q.s. simple syrup
m: vii fl oz
How many Clindamycin 300mg capsules are needed to make this compound?
vii fl. oz. = 210 g
0.02 x 210 g = 4.2 g x 1000 = 4200 mg
4200 mg / 300 mg capsules = 14 capsules