Help drug calculations?
-sedative solution has 10 mg/mL of drug what volume must be given to a 18 lb cat to get a dose of 2mg/kg?
-pt needs 1000mg of an I.V. antibiotic the label reads 1 g per 15 mL.Whats the correct dose?
-1 tablet contains 5 mg of drug a med order calls for 1.5 tablets to be given to 125lb pt what dose is given in mg/kg?
-How many g of a drug must be used to prepare 2L of a 1% solution?
Answer:
Dear Jim:
1. 89.8 kg X 2 X 10= 1,796ml.
2. Cat=8.16 kg.
2 mg X 8.16= 16.32 mg/10 ml= 1.632 ml. for the cat.
3.1 g.= 1000 mg. Then if you have 1g per 15 ml.
the patient needs 15 ml.
4.one tablet= 5 mg.
7.5 mg. X56.69 kg. then for one kg.=0.132 mg. X kg.
5. 2000 ml. = 100% ,then if you need 1%= 20 g. of drug.
This is basic math dude.
Try using ratios
mg drug/volume= x mg drug/vol
Change regular avoir dupois weights to metric before calculating, set up ratios and then convert. Make sure all your metric values are common; mg to mg not g to mg.
BTW, 1% solution is 1 gram per 100 mL so do a ratio to convert.
If I do the math for you, you won't learn, and you might kill someone by giving a wrong dose.
Hey, I go an "A" in dosage calc and so can you. This is so straight forward you will kik yourself.
The medicine and health information post by website user , ByeDR.com not guarantee correctness , is for informational purposes only and is not a substitute for medical advice or treatment for any medical conditions.
More Questions and Answers...