You're not importing it. You're an individual who has a prescription medicine. This is personal use, not commercial use. That page also says that if you're an individual wanting a substance for therapeutic use, see your doctor. The medication itself is not prohibited.
An alternative is to find another alternative that would work but won't arouse suspicion.
I'd take S.o.S's advice and contact the High Commision in London. Set out the what, how, why and see what they say.