# Percentage dilution question

#### SeattleDan

My mother is taking an antihistamine preparation containing Ketotifen. I am trying to determine how many milligrams of Ketotifen are contained in each milliliter of the preparation. Here is a pic of the package, showing the concentrations, click to maximize:

Using the Ketotifen Fumarate concentration of 0.035%, my calculations say there are 3.5 milligrams in each milliliter of the preparation. Can someone verify this, or give me the correct level? I know this is pretty basic, sorry for that, but it's been a long time since I studied chemistry! This is related to a serious health matter, so if someone could check this for me, I sure would appreciate it!

TIA

Dan

#### bjhopper

My mother is taking an antihistamine preparation containing Ketotifen. I am trying to determine how many milligrams of Ketotifen are contained in each milliliter of the preparation. Here is a pic of the package, showing the concentrations, click to maximize:

View attachment 114

Using the Ketotifen Fumarate concentration of 0.035%, my calculations say there are 3.5 milligrams in each milliliter of the preparation. Can someone verify this, or give me the correct level? I know this is pretty basic, sorry for that, but it's been a long time since I studied chemistry! This is related to a serious health matter, so if someone could check this for me, I sure would appreciate it!

TIA

Dan
one ml of the preparation equals one gram
Ketotifen content 0.025 w %
Mg Ketotifen I*0.025*1/100 *1000=0.25 mg
Ketotifen fumarate = 0.35 mg