How do you know the problem is tardive dyskinesia? Have you considered akathisia? In either case, your friend should be seeing a doctor, right away, not consulting the internet for alternative treatments. The most likely course of treatment, at least at first, is discontinuation of the offending drug (which you did not identify), and symptomatic treatment with other prescription medication.

I strongly urge medical consultation. The longer these symptoms persist, the more likely they are to become permanent.

Lar