Wiki multiple pushes of the same drug

[bluemoon1]

How do you code multiple pushes of the same therapeutic drug given in the doctor's office
when there is less than a half hour between the pushes?

For example a push of demerol is given at 2:30 and again at 2:45

 

[hkgraddy03]

Multiple pushes same drug

I add the times together due to the description of the cpt stating same substance or drug http://jop.ascopubs.org/content/5/5/252.full