Pharm ???? grains converted to mg. | allnurses

# Pharm ???? grains converted to mg.

1. 0 Hi, stuck on a problem (gr iiss to mg) I know how to convert grains to mg, but this one problem I'm please assist. Thanks in advance.

Joined Oct '08; Posts: 37; Likes: 2.

3. 0
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.
4. 1
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
mamamerlee likes this.
5. 1
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)
BEDPAN76 likes this.
6. 1
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!
mamamerlee likes this.
7. 0
Thanks for the responses. It helped
8. 2
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????
Last edit by mamamerlee on May 6, '10 : Reason: add on
Faeriewand and Up2nogood RN like this.
9. 1
Interesting some say 65 and some say 60 mg per grain. Last semester when we went over this we were told 60grains per mg.
BEDPAN76 likes this.
10. 0
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.
11. 2
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.
mamamerlee and caeRn like this.
12. 0
Unit conversion dot org says 10 grains = 647.989100002 milligrams.
13. 1
I was taught 60 mg to 1 grain. This is interesting...
BEDPAN76 likes this.
14. 2
Seriously, is anybody still ordering in grains? In all my years of nursing I have never once seen an order using the apothecary system. Nursing students have enough to worry about without cramming useless information into their poor brains.
Teresag_CNS and Up2nogood RN like this.