I read up on Keppra - which is an anti-epileptic drug.
http://www.drugs.com/keppra.html
Do you have epilepsy or was used as a "cross-over" for T? I was prescribed "Gabapentin" by a Neuro. (not an ear dr) and found it's really not for it and actually can be ototoxic. I took it for 2 weeks and it gave me ongoing daily headaches till I said "enough and went off them". It did nothing, but actually exacerbated the T. The Dr. wanted me to increase to 600 mg. No thank you.
Keppra info. was quite lengthly on it's affect with people who have any type of mental illness or could trigger them. Did you have any these issues - How long you've been on it? What sort of T did you have at the time?
What is Viking h?
Sorry with the multiple questions. Trying to find answers myself.