Dear Jack A,
Welcome to HealingWell. You are absolutely in the correct place. We deal with all Autoimmune, Arthritic & Rheumatic issues here.
Personally I never have been on Restasis.
We have a few great folks here with Sjogrens. Curley is great, she'll see this I'm sure. Ducky our fellow moderator is also familiar with thyroid disorders.
You're right on target with dry eye being related to the Sjogrens and the Hypothyroid. Sjogrens will zap moisture from pretty much all of the mucus membranes (eyes, mouth, nares, vaginal canal) And yeah, low thyroid can make weight loss difficult & weight gain very easy.
I don't have a 2006 drug reference guide, so Restasis isn't in my text. But I am sure if weight gain is a possible side effect it will be stated so in the Rx print out.
But I'm sure you'll get some replies from fellow members who are indeed on Restasis.
Glad to have you. Post back soon.
Take good care,
Erin