drops in 1 cc

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drops in 1 cc

Postby ginnymarie_1999 » Fri Apr 16, 2004 11:10 am

a dr orders 10 drops of a medication, how many drops are in 1 cc? Is a drop and a mm the same?
ginnymarie_1999
 

Postby shill » Sat Apr 17, 2004 3:12 am

According to this page, there are:
0.04 ml per drop
20 drops per ml
furthermore:
1 ml = 1 cc = 1 cm³
therefore:
There are approximately 20 drops in 1 cc (cm³).
shill
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Re: drops in 1 cc

Postby RICHARD » Fri Mar 24, 2006 12:59 am

CONTAINER 15MLS

IRECTIONS. 2GTTS. EACH EYE 3X, PER DAY.
HOW LONG SHOULD CONTAINER LAST? :wink:
RICHARD
 

Re: drops in 1 cc

Postby Guest » Fri Mar 24, 2006 1:01 am

ginnymarie_1999 wrote:a dr orders 10 drops of a medication, how many drops are in 1 cc? Is a drop and a mm the same?
Guest
 

Drops in 1 cc

Postby Chaad » Fri Aug 04, 2006 6:31 am

ginnymarie_1999 asked:

A doctor orders 10 drops of a medication, how many drops are in 1 cc? . Is a drop and a mm the same?

For most pharmaceutical applications, 1 cc (cubic centimeter) is expected to yield 20 drops.

Shill is quite correct in saying :
1 cc = 1 cm³ (cubic centimeter) = 1 ml (1 mili liter or one one-thousandth of a liter.) . This is by definition.

There are approximately 20 drops in 1 cc (cm³ or ml).
Inversely, there are 0.04 cc in 1 drop (1÷20). .
This is an average figure, determined by experiment, using water-based solutions.

This not an exact conversion because there is no precise definition of a drop; Drops will vary slightly depending upon the viscosity and density of the fluid. The size of the dropper makes little difference, since the drop size depends primarily upon weight or gravity (which is constant, for all practical purposes).

Fluids of higher viscosity require more force to separate a droplet, but in aqueous (water-based) solutions, the weight or density of the fluid generally increases along with the viscosity. (In other words, thicker solutions are also heavier, so it all "equals out.")

Your follow-up question is a bit confusing (" Is a drop and a mm the same? ") since mm (milimeter) is a measurement of distance, not volume.

• If you meant ml your question is answered, since one ml equals one cc, or ≈ 20 drops.
• If you meant one mm³ (cubic milimeter), there are 1000 mm³ in one cc, therefore there are 50 mm³ in one drop (1000 ÷20).
• If you meant one minim ... One minim (abbreviated min.) is defined as 1/60th of a Dram, and is about 1/16th of a cc, or about 1.55 drops.

RICHARD then asked:

For a container of 15ml, with a Rx as follows: 2 Gtts. (drops) EACH EYE, 3x PER DAY... HOW LONG SHOULD the CONTAINER LAST?

Assuming Richard has 2 eyes, the consumption rate would be 12 drops per day (2 x 2 x 3). His supply is about 300 drops (15 x 20) and should last 25 days (300÷12)


[/i]
Chaad
 

Postby Scunner » Tue Aug 08, 2006 11:07 am

Umm, 1/20 == 0.05
Scunner
 

Size of a drop

Postby mudbug » Tue Oct 03, 2006 3:34 am

The size of a drop depends not only on the type of material, but also upon the force of gravity. It probably is also affected by the type of the material that it is being dropped from (i.e. how much adhesion between the substance and the dropper).
mudbug
 

drops in a mL

Postby Kirinin » Wed Jan 31, 2007 1:16 pm

People often say twenty, but it tends to come out somewhere between 20-30 if you're talking about stuff that's not very viscous. I've noted this in tincture, which is a mixture of etOH and water, and is often drop-dosed.

-K
Kirinin
 

Re: drops in 1 cc

Postby aldani_0920 » Thu Dec 27, 2007 11:02 pm

RICHARD wrote:CONTAINER 15MLS

IRECTIONS. 2GTTS. EACH EYE 3X, PER DAY.
HOW LONG SHOULD CONTAINER LAST? :wink:


ANS. 62 days.
aldani_0920
 

Re: drops in 1 cc

Postby aldani_0920 » Thu Dec 27, 2007 11:06 pm

aldani_0920 wrote:
RICHARD wrote:CONTAINER 15MLS

IRECTIONS. 2GTTS. EACH EYE 3X, PER DAY.
HOW LONG SHOULD CONTAINER LAST? :wink:


ANS. 62 days.
----no wait, should be 25 days
aldani_0920
 

How long will 15ml of eye drops last at 6 drops per day?

Postby drquack » Tue Mar 25, 2008 5:58 pm

15 ml of eye drops, using 6 drops per day.

15 ml x 1day/6 drops x 20drops/ml = 50 days, with one drop per eye, not 2.

The question here is, why 2 drops instead of 1 drop? Likely you are using it for both eyes, one drop per eye. If this is two drops for one eye, the fluid volume of the external eye is only about 15 to 25 microliters. A single drop is 50 microliters. One drop per eye is like saying, "put 2 cups of water in your 1 cup container"! The rest of the medicine will simply run down your cheek. Two drops per eye is even worse! Ask your doctor!
drquack
 

Re: drops in 1 cc

Postby Guest » Wed Sep 15, 2010 8:21 am

5,000units per 1cc and I need to give 125u, how many cc's is that ?
Guest
 


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