Pharm ???? grains converted to mg.

Nurses General Nursing

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Hi, stuck on a problem (gr iiss to mg) I know how to convert grains to mg, but this one problem I'm:confused: please assist. Thanks in advance.:)

Orca, ADN, ASN, RN

2,066 Posts

Specializes in Hospice, corrections, psychiatry, rehab, LTC.

Since gr iss=100mg, I presume the answer is 200mg.

This question brings back memories. In my second semester of nursing school I was about to give my first injection, which made me nervous enough. Then I saw that the physician had written the order in grains. Fortunately I had brought my conversion table along.

Specializes in Med/Surg, Critical Care.

If my memory serves me right (and its been a long time since I did anything with grains). You are converting 2.5 grains to mg. 1 grain = 64.8 mg, so if I am correct the answer should be 162mg

celclt

274 Posts

griiss = 150 mg (2.5 gr x 60 mg/gr = 150 mg) -hth!

oops:

i =1 and ss= 1/2 so it is 2.5 gr (I had to take latin in hs)

Specializes in Assisted Living Nurse Manager.

ii = 2, ss = 1/2 so you would have 2 1/2 grains

There are 65 mg per gr so you would have 162.5 mg in (iiss grains).

At least this is the way I figured it!

Thanks for the responses. It helped:up:

mamamerlee, LPN

949 Posts

Specializes in home health, dialysis, others.

I always remember that a plain, regular aspirin is 5 gr/325mg. Roughly 1 gr/65 mg. Therefore iiss (2 l/2) gr / 162.5 mg

But who is still using grains? Shouldn't all those old docs have died (or at least retired) by now????

Specializes in Emergency Dept. Trauma. Pediatrics.

Interesting some say 65 and some say 60 mg per grain. Last semester when we went over this we were told 60grains per mg.

Specializes in Hospital Education Coordinator.

JC does not like to see "iss" and similar entries in charts because it leads to ----guess what!! Confusion and possible med errors. I will be glad when grain orders are extinct.

Specializes in ER, Trauma.

I always remeber that 10 grains of Aspirin = 650 mg, hence 1 grain = 65 mg, or else I've got years of incident reports to catch up on.

Specializes in ER, Trauma.

Unit conversion dot org says 10 grains = 647.989100002 milligrams.

Specializes in LTC.

I was taught 60 mg to 1 grain. This is interesting...

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