"i am reading different adhd meds affect ppl differently. i see ppl posting that the same mgs meds from different manufacturers have varying potency. i was an adhd child. i am now 56 y/o. i started taking concerta (long acting ritalin) 56 mg from 2007 to 2014, then a new dr wouldn&#039;t prescribe it for me in 2014. it was a miracle drug. it gave me energy, strength, focus, avid concentration, a positive mood, goals and hope. now, i have been off adhd meds for 2 yrs. i gave it time to see if i could get better without it. it&#039;s getting worse. i stay in bed, don&#039;t shower, no motivation. drs fear addiction &#039;coz of my age. i can&#039;t go on as a vegetable. off the meds i grind my teeth like mad. i am gnashing my teeth from aggravation and lack of focus."