Oooooooooooo! A home visit - you lucky thing!!! A lot of PCTs don't have that kind of service so it bodes really well for your ongoing support.
If he's coming to talk to you about meds, then I guess he's talking about disease modifying drugs (DMDs). The best place to find out about them is the msdecisions website: it gives clear, objective information about the options. Have a look at that and I'm sure you'll think of loads of questions to ask him. One piece of advice: the sooner you choose, the sooner the prescription gets done and you can get started on whatever DMD you chose. It takes a while to get the funding in place from the PCT and then to get the neuro to sign the prescription, never mind the logistics of actually setting up deliveries etc. That's not to say that you should rush your decision mind you - make sure you're happy before you proceed.
Most MS nurses are absolutely lovely - I hope yours is too.