I forgot how to do simple math!! - Sitcoms Online Message Boards

dawsongirl · 07-01-2005, 03:41 PM

Gawd, I feel stupid. Here's my problem:

I have 250mg of the drug Cytoxan, and I add 50mL of solution to it. The question is, How many mL will be dispensed per dose?

The answer is 12.5 mL. How the heck do you get that???

Check that...I have 1g total of Cytoxan and the prescription calls for 250mg of it once a day for 5 days.

Sara Micelli · 07-01-2005, 04:19 PM

Quote:

Originally Posted by dawsongirl

Gawd, I feel stupid. Here's my problem:

I have 250mg of the drug Cytoxan, and I add 50mL of solution to it. The question is, How many mL will be dispensed per dose?

The answer is 12.5 mL. How the heck do you get that???

I have no idea. I got 10.5 mL.

dawsongirl · 07-01-2005, 04:25 PM

I got 0.0022 something...I dunno, way off.

Dutabi84 · 07-01-2005, 04:33 PM

Are you sure the perscription isn't for 4 days? Because 50 mL/4 = 12.5

Plus, 1 gram isn't enough for 5 days of 250 mg, you'd need 1.25 grams for 5 days, or 1 gram for 4 days...or something like that.

dawsongirl · 07-01-2005, 04:38 PM

It says 5 days. Cytoxan 250mg IV qd x 5 days. Of course, that doesn't mean it's not wrong. This worksheet is kind of stupid anyway.

Sara Micelli · 07-01-2005, 04:40 PM

Quote:

Originally Posted by Dutabi84

Are you sure the perscription isn't for 4 days? Because 50 mL/4 = 12.5

Plus, 1 gram isn't enough for 5 days of 250 mg, you'd need 1.25 grams for 5 days, or 1 gram for 4 days...or something like that.

I thought you were supposed to convert the mg to mL then add 50 mL.

1 mL=100 mg

Dutabi84 · 07-01-2005, 04:47 PM

Quote:

Originally Posted by Sara Micelli

I thought you were supposed to convert the mg to mL then add 50 mL.

1 mL=100 mg

Hmm, well I just figured it was wondering how much solution was dispensed per dose of the drug, in mL, in which case converting isn't necessary..I could be wrong.

dawsongirl · 07-01-2005, 04:53 PM

Quote:

Originally Posted by Sara Micelli

I thought you were supposed to convert the mg to mL then add 50 mL.

1 mL=100 mg

I looked all over the net for that conversion!

I'm thinking I'm not going to work in a hospital pharmacy.

dawsongirl · 07-01-2005, 04:58 PM

Quote:

Originally Posted by Sara Micelli

I thought you were supposed to convert the mg to mL then add 50 mL.

1 mL=100 mg

So that would be 2.5mL=250mg, right? Then add 50mL and get 52.5mL. Then I get 10.5 like you. For four days, it's 13.something.

Stupid problem. How did I ever pass trig?

Nighthawk76 · 07-01-2005, 05:35 PM

What little math skills I once had vanished a long time ago.

dawsongirl · 07-01-2005, 05:47 PM

Quote:

Originally Posted by DAX

What little math skills I once had vanished a long time ago.

Apparently mine have too.

My rule for math in HS was always, once the final was over, I forgot everything the minute I walked out the door.

Sara Micelli · 07-01-2005, 05:57 PM

Quote:

Originally Posted by dawsongirl

I looked all over the net for that conversion!

I'm thinking I'm not going to work in a hospital pharmacy.

Well, I could be completely wrong too. lol Math isn't my strong point either.

Sara Micelli · 07-01-2005, 06:01 PM

Quote:

Originally Posted by Dutabi84

Hmm, well I just figured it was wondering how much solution was dispensed per dose of the drug, in mL, in which case converting isn't necessary..I could be wrong.

That's what it's asking, but you still need to convert if the 250 mg is taken into account for the solution of the problem. If it isn't, the answer is 10 mL. There's probably some really weird way to solve the problem that we haven't figured out yet. This is going to drive me insane.

Edited: The 1 mL= 100 mg conversion is if you're measuring water. The conversion is different for every substance.

dawsongirl · 07-01-2005, 06:21 PM

Quote:

Originally Posted by Sara Micelli

That's what it's asking, but you still need to convert if the 250 mg is taken into account for the solution of the problem. If it isn't, the answer is 10 mL. There's probably some really weird way to solve the problem that we haven't figured out yet. This is going to drive me insane.

Edited: The 1 mL= 100 mg conversion is if you're measuring water. The conversion is different for every substance.

Oh great...no wonder I couldn't find anything!

I know what you mean. I hate when stupid little problems like this defeat me.

Kay Scarpetta · 07-01-2005, 07:13 PM

Are you in pharmacy school or something?

07-01-2005, 03:41 PM	#1
dawsongirl Member Forum Icon Join Date: Jan 04, 2001 Posts: 53,140	I forgot how to do simple math!! Gawd, I feel stupid. Here's my problem: I have 250mg of the drug Cytoxan, and I add 50mL of solution to it. The question is, How many mL will be dispensed per dose? The answer is 12.5 mL. How the heck do you get that??? Check that...I have 1g total of Cytoxan and the prescription calls for 250mg of it once a day for 5 days.

07-01-2005, 07:13 PM	#15
Kay Scarpetta Defy Gravity 8.26.05 Forum Superstar Join Date: Jul 04, 2001 Location: La Vie Boheme Posts: 28,013	Are you in pharmacy school or something?
	__________________ The people who think they know everything about Broadway make me laugh. They've never seen a Broadway play in their life. "oh mi godddd RENT's a mooovie! lyke 525600 minuuuuuuutes!" No. To be a Broadway Freak, you must live, eat, sleep, study, devout, think, obsess, dream, believe Broadway. You must know original & revival casts, soundtracks, performance runs, dates, theatres, numbers, how many Tony Awards A Chorus Line won. You must be Broadway. That's right bitches. I AM Broadway.

07-01-2005, 04:25 PM	#3
dawsongirl Member Forum Icon Join Date: Jan 04, 2001 Posts: 53,140	I got 0.0022 something...I dunno, way off.

07-01-2005, 04:33 PM	#4
Dutabi84 kittens must die Forum Fanatic Join Date: Apr 22, 2003 Location: MN/TX Posts: 11,026	Are you sure the perscription isn't for 4 days? Because 50 mL/4 = 12.5 Plus, 1 gram isn't enough for 5 days of 250 mg, you'd need 1.25 grams for 5 days, or 1 gram for 4 days...or something like that.

07-01-2005, 04:38 PM	#5
dawsongirl Member Forum Icon Join Date: Jan 04, 2001 Posts: 53,140	It says 5 days. Cytoxan 250mg IV qd x 5 days. Of course, that doesn't mean it's not wrong. This worksheet is kind of stupid anyway.

07-01-2005, 05:35 PM	#10
Nighthawk76 Rachel Berry Forum Celebrity Join Date: Feb 28, 2003 Location: Illinois Posts: 23,254	What little math skills I once had vanished a long time ago.