Hey Corrie,
Tics, muscle twitching and gastric issues are a pretty common
side effect with
Concerta, and with you developing the
tics and gastric issues post starting, I would be still believe your facial tics are a Concerta side affect.
It's actually a central nervous system stimulant and with you having MS, basically a faulty central nervous system, there's more potential for it to trigger tics and or to exacerbate other MS motor related issues.