How do you convert mL to Mg?
I have a question that states, there is a prefilled syringe of 1 percent lidocaine in your ambulance. It contains 5 mLs . How many Mg does it contain? Please help me set this problem up I am not looking for the answer I just am lost and could use some help I have a ton of questions like this and don't know how to do them .
Comments
1% means 10 mg/ml.
so a 5ml syringe would contain 50 mg of lidocaine.
(5ml * 10mg/ml = 50)
In this case you really do not need to do any conversion. What it is really asking for-because a solid is dissolved in the liquid-is how much of the solid (the lidocaine) is in this syringe. So, since we know solid is grams, milligrams, etc., and liquid is liters, milliliters, etc, then we know the lidocaine is the solid in this case and so it is 1 perCENT or 1 for every 100. In the case of mg to mL it is still a percentage...how much of the solid mass is dissolved within the liquid? So, it is ALWAYS ALWAYS like this:
#parts solid per hundred=percentage of a solution-which is conventionally expressed as number of grams/100 mL
So if you had 100mL solution, then there would be 1 g or 1000 mg of Lidocaine. So, now you just have to divide both the 100 mL and the 1000mg by 20 (since you have 5 mL you need to get back to that amount, right? And basic algebraic law states what you do to one side you must do to the other so both sides must be divided by 20 which is what you would need to do to get from 100 mL to 5 mL. I am sorry if I have made this so much more confusing than necessary. To recap it is always that the percent is exactly the amount of grams per 100 mL. So, an IV bag of normal saline with 5% dextrose would go like this: 5g/100mL, but we have 1000mL so it would contain 50 g of dextrose. Okay, hope I helped.
Michael
1% is saying there there is 1/100. Therefore, there is 1 gm of lidocaine per 100ml or 1000mg/100ml = 10mg/ml. It is Gm and not mg right off the bat because Gm like Liter is the basic unit. then convert to mg by multiplying by 1000 or moving decimal point 3 times to the right. your question can't really be answered because mL and mG are two different units, but you can still get the answer by what I said
Hi.... dear Amy,
* milliLITTERS (mLs) and milliGRAM(s) (Mgs) are 2 different units for measuring 2 different quantities. mLs for liquids and Mgs for solid substances.
* For simplicity be known that some amount/quantity of a drug(substance) is dissolved in some quantity of liquid/water etc. (as u come across ampules containing some amount of drug 'mg' in some liquid 'ml').
* concentrations/strengths of drugs is stated in terms of percent or percentage (%) on ampules, etc.
*per cent (%) means PER EVERY HUNDRED (of the fluid/liquid);
and DIGIT/NUMBER before it (%) IS (usually indicating) GRAMS.
First of all u came across the word, **ONE PERCENT, it meant, ONE per ONE HUNDRED.
As u had ONE PERCENT** (strength/concentration of the drug), it means that, u had:
ONE GRAM PER ONE HUNDRED MILLILITTERS(u hadnt ACTUALLY, but it surely means so) OR
simply, One THOUSAND (1000) MILLIGRAMS ( AS 1 GRAM EQUALS 1000 MILLIGRAMS) in ONE HUNDRED MILLILITERS(again not actually).
If u simplify above words mathematically (that u had) one thousand milligrams in one hundred millilitters, which can be written as 1000/100 (one thousand divided by one hundred) u get the answer 10/1, meaning, 10 milligrams in 1(each) millilitter.
(10 mg/ml), Right?
Upto now we just understood that ONE PERCENT MEANS ten mg per mill (ml). (10 mg/ml) Right? (No!! read ovevr n over again). LOL.
As u had 5 mLs lidocaine of 1% strength, meaning, it contained 10 mgs per each mill, so 5 mills will obviously contain 50 mgs. (your question was how many Mg does it contain?) got the answer now? i m sure.
u may simply remember: (when concernrd with the medicines)
1%=10 mgs/ml
2%=20 mg/ml
2.5%=25 mg/ml
5%=50 mg/ml
10%=100 mg/ml
20%=200 mg/ml
25%=250 mg/ml
*****this is a simple maths, to memorize n master, just multiply by ten to the percent value (simply by adding zero to the whole number; or moving the decimal one place to the right to the percent value) and get 'milligrams per milliliter.'
u can get percent value/strength of the drug too reversing the method marked as***** .