I am very sensitive to meds too, T.
My daughter had baby teeth problems too, cause her body was eating the roots from the bottom up. All that was left was the crowns by the time she was about 5, and they fell out piece by piece. Thankfully her adult teeth are good, well except the braces part.

(I had to have her knocked out at a hospitial at age three, to have 11 root canals done!).
Remember, those are small studies and your doc might not be too keen ... but given that Rebif and Avonex have very similar efficacy, yet they are really just 1/2 (or twice) the dosage of the
same drug, I believe variances in dosage is probably gonna be ok with all the drugs. JMHO
Cherie
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I am not a Neurologist, Physician, Nurse, or Hairdresser ... but I have learned that it is not such a great idea to give oneself a haircut after three margaritas
.