I think it is long term use of biotin that is the one to watch for.
As you know, I'm a type I- but I am also prescribed B1 for my neuropathy. Most stores only sell b12, which isn't what really helps the nerves anyhow (most people get enough b12). I order it from Amazon.

Personally, I would ask your dr on this one. You don't want to mess around with your b vit balance!