Week 3 - Pharm Calculations Flashcards

1
Q

Dose: The _______ of drug to be delivered to a patient to achieve an ________ effect

A

quantity, intended

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2
Q

A drug dose is expressed as ?

A

Single dose, daily dose, total dose

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3
Q

Single dose: Amount taken at _______ ______.

A

One time

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4
Q

Daily dose: Amount taken ________.

A

Daily

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5
Q

Dosage rate: should be expressed in ?

A

milligrams per kilograms (or milligrams per pound).

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6
Q

Dosage regimen is the _________ of dosing (e.g. three time daily for 7 days).

A

schedule

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7
Q

Drug doses are based on:

  1. ________ and __________ activity: ______
  2. _________ and __________ properties: Hydrophilic, lipophilic
  3. Dosage _________ used: Tablet, capsule, transdermal patch, etc
  4. ________ of Administration: PO, IV, etc
  5. _________ factors: Age, weight, body surface, liver and kidney function, etc
A

Biochemical, pharmacologic, ADME, Physical, chemical, form, Route, Patient

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8
Q

How do you calculate a drug dose?

A
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9
Q

Example: If a 20-kg dog is to be given amoxicillin at the rate of 10 mg/kg and injectable amoxicillin at a concentration of 100 mg/mL is available, the dosage calculation would be as follows:

A

2 mL

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10
Q

Example: a 20-kg dog is to be given amoxicillin at the rate of 10 mg/kg and injectable amoxicillin at a concentration 100 mg amoxicillin tablets are available, the formula becomes as follows:

A

2 tablets

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11
Q

Because most scales used to weigh animals provide the weight in pounds, a conversion must be made from pounds to kilograms:

A
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12
Q

If the order is to just “give a dog 300 mg of amoxicillin”, then the ordered amount is simply divided by the ___________ of the drug to determine the amount to be administered

A

concentration

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13
Q

Usually, you need to calculate the _______ of a dose, the ________ of doses, or the _______ quantity of drug to be dispensed.

A

size, number, total

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14
Q

How many teaspoonfuls would be prescribed in each dose of an elixir if 180 mL contained in 18 doses?

A

180/18 = 10 mL

10 mL = 2 teaspoonfuls

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15
Q

How many mL of a liquid would you provide a patient with 2 tablespoonfuls twice a day for 8 days?

A

30 x 32 = 960 mL

2 tbsp = 30 mL
32 doses needed

Total dose = size of dose x number of doses

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16
Q

1 kg = _______ g?

A

1000g

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17
Q

1 kg = ________ lb?

A

2.2 lb

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18
Q

1 g = ________ mg

A

1000

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19
Q

1 mg = ________ ug

20
Q

1 mg = ________ g

21
Q

1 lb = _______ g

22
Q

1 lb = ________ kg

23
Q

1 lb = _________ oz

24
Q

1 oz = _________ g

25
1 ug = ________ mg
0.001 mg
26
1 ug = _________ g
0.000001 g
27
1 L = _________ mL
1000
28
500 mL = _______ cups
2 cups
29
2 cups = ________ lbs
1 lb
30
15 mL = _______ Tbsp
1
31
5 mL = ______ tsp
1
32
30 mL = _______ oz
1
33
240 mL = _______ cup/glass
1
34
A cat in your clinic is diagnosed with pyelonephritis (bacterial infection of the kidneys). You prescribe enrofloxacin to be given once daily at 5 mg/kg to a 10-lb cat for 7 days. How many 22.7- mg tablets should be dispensed to the client?
1 pill per day 7 pills total
35
A veterinarian prescribes sulfadimethoxine (Albon) for Coccidia. The patient is a puppy that weighs 8 lbs. and needs treatment for 21 days. The dose of Albon is a 25-mg/lb. to be given once daily. The drug is supplied at 250 mg/5 mL
4
36
Which strength tablets of enalapril maleate (ENACARD) would be most convenient to dispense in the treatment of an 11-lb dog at a daily dose of 0.5 mg/kg? How will you determine the strength of the tablets?
2.5
37
Mycoplasmal pneumonia is circulating among pigs on a farm. The veterinarian orders lincomycin HCl for a 500-lb Yorshire boar. The dosage to be administered is 5 mg/lb/day for 4 days. The medication on hand is 100 mg/mL in a 50-ml multidose vial/bottle. A) How many mL will be administered to the boar each day? B) How many bottles of medication does the owner have to purchase to treat the boar for 4 days?
38
Cimetidine (an H2 receptor antagonist) may be administered to dogs with esophagitis or gastritis. A chihuahua at your clinic is prescribed cimetidine at a dose of 5 to 10 mg/kg by mouth every 6 to 8 hours. The oral solution contains cimetidine at 300 mg/5 mL. Calculate the dosage range in mg for a cat weighing 9.4 lb.? • 5 mg/Kg • 10 mg/Kg
39
A veterinarian orders clenbuterol syrup for a 200-lb foal for the management of airway obstructive disease. The dosage is 0.8 mcg/kg twice daily for 3 days. The syrup contains 72.5 mcg/mL How many milliliters need to be dispensed?
40
The drug pimobendan (Vetmedin) is used to treat dogs with congestive heart failure (CHF) at a daily dose of 0.5 mg/kg. Scored, chewable tablets are commercially available containing 1.25 mg and 5 mg per tablet Which strength tablets would be most convenient to administrate for a 16.5-lb dog
41
Ponazuril is an anti-protozoal used in multiple species. In horses, it is used for the treatment of equine protozoal myeloencephalitis (EPM) caused by Sarcocystis neurona. A veterinarian has ordered 5 mg/kg ponazuril once daily for a 1200-lb horse for 28 days. Tubes of 127 g of ponazuril paste are available; these contain 150 mg ponazuril per gram How many tubes of the medication are needed for 28-day treatment?
42
The dose of most drugs used to treat neoplasm is calculated according to the _____ ______ _______ (____) of the patient.
body surface area, BSA
43
BSA is correlated with the _______ of the animal to convert an animal weight to ____ ____.
weight, BSA m2
44
Dose Measurement using body surface area Example: For large-breed dogs, the dose of digoxin is 0.22 mg/m2. Calculate the dose for a dog weighing 22 kg
45
The dose of methotrexate sodium for neoplastic disease in cats is 2.5 mg/m2 twice weekly. Calculate the single dose for a 2-kg cat.
46
The maximum dose of doxorubicin in canine chemotherapy is 200 mg/m2. Calculate the maximum dose for a dog weighing 44 lb.
47
A 44-lb dog is to be treated for lymphosarcoma with vincristine sulfate, 2 mg/mL. The dose is 0.5 mg/m2. How many milliliters will be given to the patient? How to determine how many mLs are needed?