Acidity of Coka cola vs orange juice or other drinks?

I take adderall xr and i would like to be more aware of what to look out for as far as foods go in relation to its bodily absorption rate. Recently I learned that its effects can be enhanced when your gastrointestinal track is less acidic, which can be atcheived via taking an antacid. I have proven this true through safe experimentation. The problem i have now is measuring the acidity of soft drinks like coca cola which contains small amounts of carbonic acid. I have asked several chemists already but their beliefs are differing. Can anyone clarify acidity of coca cola and or other soft drinks. If someone could compile a list of drinks by acidity or find a link to that type of content I would sincerely appreciate it!