I don't have any personal experience, but I just did a quick google search for you. Check out this site: http://ocnorml.org/news/pot_strains.htm

I noticed the last paragraph at the bottom of the page:

Here is a quote from Hilary Black of the British Columbia Compassion Society:

"Indica and Sativa are the two main varieties of the cannabis plant used as medicine. There are many strains that are crosses of those two varieties. Within each of those varieties and crosses there are a huge number of individual strains, each with a different cannabinoid profile and effect. According to anecdotal evidence, the Indica strains are a relaxant, effective for anxiety, pain, nausea, appetite stimulation, sleep, muscle spasms and tremors, among other symptoms. The Sativa strains are more of a stimulant, effective in appetite stimulation, relieving depression, migraines, pain and nausea. We are now aware of specific strains that are effective for specific conditions and symptoms."

I can't validate this quote, but it seems to suggest that either strain would be effective. There's plenty of compassionate people who post here and hopefully they can give you some advice. Best of luck.