They do not cancel each other out but there is evidence that lansoprazole (Prevacid) may decrease the effectiveness of clopidogrel (Plavix).
This depends on what medication. You should not drink anything with a lot of caffeine if you take a stimulant medication or an anti depressants this would cancel out the medication and could lead to serious medical condition's.
It is not possible to cancel the side effects. Approach your parents and/or your doctor and tell them that \you dislike the medication for its side effects because it makes you feel uncomfortable (specify). From there, I am sure your parents or your doctor would try find other medications that won't have the exact same effects as adderall but are similar.
The future tense of cancel is will cancel.
That depends entirely on what you wish to cancel.
If you wanna cancel it you can enter to Account Manager. And cancel it.
How do I cancel my membership
How do I cancel service
I want to cancel my tracfone service
click cancel
Hit cancel
press cancel
Cancel it XD