Table 1 Examples of prescription instructions represented in our model

take 2 tablets 4 times a day

2

2

4

4

1

1

tablet

2 tabs qid

2

2

4

4

1

1

tablet

a half to one tablet to 2 three times a day when required

0.5

2

0

3

1

1

tablet

10 mg to be taken weekly

10

10

1

1

7

7

mg

2 with each meal

2

2

3

3

1

1

?

take 2.5 ml twice a day

2.5

2.5

2

2

1

1

ml

half a tablet twice a day when required

0.5

0.5

0

2

1

1

tablet

2 puffs 6 hrly prn

2

2

0

4

1

1

puff

1 to 3 every day

1

3

1

1

1

1

?

one or two to be taken every 4 to 6 hours

1

2

4

6

1

1

?

take as directed

1

?

?

?

1

?

-

apply as needed

1

1

0

?

1

?

-