Can i drink spark while i am on 30mg vyvanse (lisdexamfetamine)?

Not advised.: Adding stimulants, while taking a Stimulant or Amphetamine, will increase chances of insomnia, and other side effects.

Energy Drink: Had to look this up. Spark has 120 mg of caffeine. Classic coke has 34 mg of caffeine. A McDonalds cup of coffee has 145 mg of caffeine. It probably isn't a good idea to drink any of them with ADD meds. Do people do it without problems? Yes. That is all I will say.