^ Oral dosing FTW! Especially if if you never ventured in to IV meth abuse, which means that oral dosing can still be effective! The comeup should not as quick as smoking (which means oral dosing is less addictive), and the comedown should be a smooth "descent" in to baseline, rather than a hard "crash."
I've never used meth or cocaine, though, so I can't really comment on the effects or tics with those two drugs. However, I
do have plenty (9 months) of experience of taking low (10-15/mg dexedrine, or 30-50mg/vyvanse a day) doses used for ADD relief, and I find that the tic (a somewhat repetitive thumb cracking for me) only comes on in times of heavy Norepinephrine content, such as adding a bit of Ephedrine/caffeine to my dosage, or when I'm very stressed (also having to do with norepinephrine release as one MOA), or when I drink
any amount of caffeine, since caffeine and amphetamines synergize with eachother in a very extreme way due to the way caffeine regulates cAMP levels and adenosine levels.
Sekio, maybe you can point out the
exact mechanism of amphetamines causing tics, either ADD non-abuse dosages or with amp/meth abuse dosages, and also explain why cAMP levels modified by caffeine makes the amphetamines so much stronger. I'll read peer-reviewed journals if you don't really feel like explaining, just point me in the right way.

That way the OP and thousands of other posters who will eventually see this thread will realize that their "morning coffee" is negatively affecting their ADD medicine/crystal meth dosing by potentiating the amphetamine effect almost two-fold, leading to unexpectectedly high levels of DA/NE release, leading to OCD-like behaviors, from everything as minor as cracking a specific knuckle, to crawling your carpet for some meth shards.