Taxol and Taxotere are two chemo-therapy drugs often associated with neuropathy.  Usually it starts during or soon after treatment.  I haven't heard of the drugs you mention as causing neuropathy, but if you still have the prescription labels and read down the list of possible side effects, you may find nerve damage listed as one of the less common ones.  You'll want to talk to your doctor about this, but I would think the cause of your neuropathy will be something that has happened more recently, not a drug you took six years ago.  There are several drugs and vitamin regimens that can help with neuropathy, and the sooner they are started the more likely you are to experience relief.  I found a neurologist to be the most helpful doctor in managing neuropathy, so if  your primary care doctor isn't able to help you right away, ask for a referral to a neurologist.