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 SHORT COMMUNICATION
Year : 1993  |  Volume : 25  |  Issue : 3  |  Page : 163-164

Drop volume of commercial anti-glaucoma eye drops


Correspondence Address:
Lal Avtar


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Source of Support: None, Conflict of Interest: None


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Seventy six bottles of 19 different brands of anti- glaucoma eye drops (pilocarpine 1, 2, 4 % and timolol 0.25, 0.5 %) were tested for total volume, total number of drops, drop volume, drops/ml, and duration of therapy, by using a 10 ml glass cylinder with 0.1 ml graduations and a mechanical counter. The range of the drop volume for pilocarpine 1% was 55.3 - 55.4 'l: pilocarpine 2% was 41 .O - 54.4 'l; pilocarpine 4% was 47.8 - 47.8 'l and timolol 0.25% was 38.7 - 55.2 'l; timolol 0.5% was 35.9 - 55.6 'l. Ten out of 19 brands of antiglaucoma eye drops had total volume less than the labelled amount. The drop volume of the commercial anti- glaucoma eye drops is more than optimal.






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