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Cup product


The OptiDose® cup for children's acetaminophen.


Prepulsid® oral syringe, extended.


Body weight scale (in kg).


Volume scale ( in ml).



For comparison, below is the dosage table for Children's Tylenol (from

Children's Tylenol Suspension Liquid

Children's Tylenol Suspension Liquid



Children's Tylenol Suspension Liquid

under 24 lbs

under 2 years

call a doctor

24-35 lbs

2-3 years

1 teaspoonful

36-47 lbs

4-5 years

1 1/2 teaspoonfuls

48-59 lbs

6-8 years

2 teaspoonfuls

60-71 lbs

9-10 years

2 1/2 teaspoonfuls

72-95 lbs

11 years

3 teaspoonfuls


There are a few little chores like this that have to be done before this cup product is even in the prototype stage. We will need a graph showing what doses all of the assumptions deliver. For example, if you followed the age scale on the cup, and you were a very light girl (say the 3rd percentile), what kind of doses would you receive?


However, a far greater problem stymies me everytime I look at this project. I just can't seem to find the perfect dispenser for children's acetaminophen.




The mock-up cup above shows a dandy 3 tsp cup. That is about 15 ml. The problem is that in real life 15 ml is a pretty tiny cup and the scales may be hard to read. (We don't even have a cup that size, so I haven't actually tested it.)




Standard 1 oz medicine cups hold about 30 ml. The problem with going with an over-sized cup is that the action part of the cup then tends to be down in the bottom half of the cup. This compresses the scale and makes it hard to read and generally look stupid.




Let's forget the cup and take a look at a totally different device, an oral syringe. This one is from Janssen, Switzerland. It is a very elegant design, and there is plenty of room for 2 detailed scales plus a trademark. However, the size is not right here either. These syringes tend to be about 5 ml in size. (Price might be an issue as well.)



Since the cups as made are too big, and the syringes as made are too small, my hunch is we might have to change the volume of the acetaminophen. That is a little out of my league, which is making easy prototypes to go with existing products. But the acetaminophen could probably be diluted to go with the cup, or concentrated (like the infant product, maybe I could work with that) to go with an oral syringe.

I would appreciate your comments.

Growth charts - click here to go to a CDC page with intro and links to growth charts:

Click here for raw growth chart data:

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