dosage calculations (work is shown for all)

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Hi guys! I have a D&S test on Tuesday and I've been doing practice questions. I was wondering if you could tell me if I got the answers right and if I didn't could you just point me in the right direction? I only have problems with 3 different types of questions.

Question 1: Amoxicillin 250mg PO daily is ordered. The safe dose range is 10-25mg/kg/day. The patient weights 33 lbs. Calculate the low and high safe dose. Is the physician's order within the safe dose range?

So I turned lbs to kg and got 15kg for the patients weight. For the low dose I got 150mg/day and for the high dose I got 375 mg/day. (15kg*10mg/kg/day and 15kg*25mg/kg/day). I have that the physicians order IS within range.

Question 2: The order reads: Solu-Medrol 200mg IM Q6hr.The label states "Add 4mL sterile water to 500mg Solu-Medrol for a final concentration containing 125mg/mL" How many mL will you inject for each dose?

So what I did was a ratio. 500mg/4mL = 200mg/X mL which lead me to 1.5mL of sterile water for every dose of 200mg.

Question 3: The physician's order is for Klonopin (clonazepam) 0.05mg/kg PO daily in three divoded doses for a patient who weighs 60kg. Each tablet contains 1mg. How many tablets will you give per dose?

So I set the first part like for example 1. 60kg*0.05mg/kg/day which got me 3mg per day. But it is 3 doses in 1 day so 3mg/3doses got me 1mg/dose. So for each dose I would only give 1 tablet.

Are any of these correct? If not I would really appreciate the help!!

Also I have another problem but I read the question and I'm confident I can solve it on own so I'm not including the question but could any of you help me decipher what it means because this is the first time I'm seeing it this way and we just learned dosages today:

Medical order: Atropine gr 1/150 IM now. Medication label: Atropine 0.4mg/mL.

What exactly does 1/150 mean? Is it 1/150 of a gram?

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17 minutes ago, dorkyhades said:

Medical order: Atropine gr 1/150 IM now. Medication label: Atropine 0.4mg/mL.

What exactly does 1/150 mean? Is it 1/150 of a gram?

gr 1/150 is in grains and would need to be converted to mg. Hint: 1 grain = 60 mg.

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On 5/25/2019 at 12:31 AM, 203bravo said:

gr 1/150 is in grains and would need to be converted to mg. Hint: 1 grain = 60 mg.

thank you!!! that helped a lot!!!

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