Hello,
I am not a physician but am familiar with psychotropic medication. From several sources of anecdotal reports, it has been stated the eye blinking is a side effect and the reports unfortunately indicate that it is permanent and irreversible so a change in medication will not make it stop. I have included a few sites so that you may read further about this phenomena. www.addadhdblog.com/does-vyvanse-work/ , www.dailystrength.org/c/.../3673566-any-experience-vyvanse . There are several are in this vain from consumers. The manufacturer does not mention it in their material: www.addadhdblog.com/does-vyvanse-work/ . Best wishes and good luck.
(Please excuse any typos as the spell checker is not fnctioning properly.)
Sincerely,
Ralph LMHC
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Therapist
20+ years as therapist, supervisor, clinic director at mental health, substance abuse treatment ctrs