Magnesium oxide is not absorbed orally. It remains in the GI tract as a laxative.

I doubt it is connected in any way, and is probably a coincidence.

Many viruses can inflame the liver. One is Epstein Barr (mono).
Doctors see liver functions go wonkey with many viral infections.

And while not common, even Herpes Simplex virus can affect the liver:
http://www.ncbi.nlm.nih.gov/pubmed/19930315

When you first came here I suggested you take some thiamine.
I still think that might be helpful. 100mg 3 times a day.
Thiamine is the cofactor in aldehyde metabolism to clear them.

I posted this to you before on an earlier thread.

Toxins damage nerves...and people vary in how their body can repair it...depends on genetics and whether you have the capability to make the growth factors. Viruses also damage the dorsal roots along the spine, and when that happens, there are more global symptoms all over.

This is only one example of the biochemistry involved:
http://en.wikipedia.org/wiki/Pyruvate_dehydrogenase

I don't know if there is a connection between your genetic Gilbert's and your current liver issues. That would be for a specialist to
evaluate. Your sensory issues therefore could be symptoms of another more serious thing. And that is beyond the scope of this forum format.