Most quality acetyl carnitines will be safe.

NOW brand, Doctor's best, etc. The quality makers
use GMP manufacturing. NOW and Doctor's best are
less expensive than some others like LEF.

iherb.com offers many brands to check out.

Check your Yellow Pages under physicians and there might
be a listing for holistic MD. Some hospitals also give recommendations.

There are IVs called Meiers Cocktails with various nutrients added. They are made by compounding pharmacies. Be sure to check out those too...some have run into problems with quality. However, many IVs have glutathione added, and this is helpful for PN as well. Dr. Jay Cohen MD has a statement on his site that glutathione IV helped a patient with PN induced by fluoroquinolone antibiotics. Glutathione cannot be used orally.

Here is one article on one chemo type and glutathione:
http://www.ncbi.nlm.nih.gov/pubmed/1...ubmed_RVDocSum

Cholestyramine will adsorb drugs and nutrients. It has to be used carefully and spaced away from other things.
Taurine has been helpful in people with bile flow problems.
Sluggish bile release may be helped with this supplement, 500 to 1000mg a day.

R-lipoic acid may help with blood sugar utilization, and also with the mito functions.

Your husband has been thru alot!