Question

The formula for a ciprofloxacin otic drop is given in the literature as follows.
Ciprofloxacin 1g
Propylene Glycol 50mL
Glycerin qs ad 100mL

How many grams of ciprofloxacin would be required to prepare 200 15-mL bottles of the ear drop? **PLEASE SHOW WORK**
a. 30g
b. 1g
c. 30mg
d. 3.5 ounces

Answer 1

According to given literature the formula for ciprofloxacin otic drop is

Ciprofloxacin - 1g

Propylene glycol - 50ml

Glycerol qs ad ( quantity sufficient to make) 100ml.

We need to prepare 200, 15 ml bottles of ear drop.

200 * 15 = 3000 ml

We need to calculate how much amount of ciprofloxacin is require to make 3000 ml of ear drop.

According to the literature 1 gm( 1%)of ciprofloxacin is required to make 100 ml of ear drop.

For 3000 ml ear drop = 3000*1/100 = 30 gms.

30 gms of ciprofloxacin is needed to make 200, 15 ml bottles of ear drop.