Saturday August 12, 2006
Drug bug - 2

Yesterday we learned that ratio solution is always between gram and millilitres (gms:mls - 1: 1000).

Now let see: What does percentage (%) expresses ?

Percentage (%) expresses the number of grams of the drug per 100 milliliters of solution.


Examples:

· Calcium Gluconate 10% contains 10 gms 'pure drug' per 100 mL solution

means
10 gm / 100 mL or
10,000 mg / 100 mL or
100 mg / mL


· Lidocaine 2% contains 2 gm 'pure drug' per 100 mL

means
2 gm / 100 mL
2000 mg / 100 mL
20 mg / mL

Notice that percentage is written between 2 unequivalent measurements (gram and millilitre) - drug bug ?