Still on the theme of MS: thanks to Warthog's warning I've got myself a little more informed; thought other newbies might find the following "self-help tips" useful, edited from the Blooming Awful website.
"Listen to your body - stop feeling guilty that you can't eat a healthy diet, since any diet is better than none. If your body will only allow you to eat and keep down Pop-tarts or chocolate milkshake, go ahead - we give you permission!
Eat small snacks often - even if it's just a bite of toast every hour
Eat ginger (biscuits, tea, root, stem, capsules, ale/root beer) [this reminds me that someone on this group has posted a recipe for MS ginger biscuits, which I must go back to find and try]
Eat Dry biscuits/toast, especially before getting out of bed
Canteloupe melon, papaya (pawpaw) and pineapple are all supposed to be good for digestion and have a relatively high fluid content
When symptoms occur suck on a sugar lump that has a drop of peppermint oil on it 9(NB peppermint is not suitable if you're using homeopathy)
Don't drink and eat at the same time - you might not feel better but you're less likely to vomit if you keep fluids to 30 minutes either side of eating
If you can't tolerate cold food/drinks, try hot, and vice versa.
Dissolve a teaspoon of salt and a teaspoon of sugar in a pint of hot water - drink at whatever temperature you find easiest to tolerate
Try a teaspoon of cider vinegar in a cup of warm water first thing in the morning
Sip herbal teas
If you're having trouble keeping down fluids, try Lucozade, Sprite, 7-Up, Slimfast or similar "food" drinks if you are unable to eat at all
Take Vitamin B6
Don't forget alternative medicines such as homeopathy, acupuncture and herbal remedies
Wear sea-bands (acupressure wrist bands for travel sickness - available from chemists) [I recall someone on our group recommending this]
If excessive saliva is a problem, try sucking on a very small sweet or a lemon/lime wedge, or drinking lemon/lime juice. "