Well I don't really know if I can post a link to another forum, and if I can't I'm sorry
But here is a great compilation with lots of drugstores in Lisbon, with feedback and what you can usually find, from Barbear Clássico (it's in Portuguese though). I find it very useful, great work from lots of people who are also here on B&B and can certanly help you.
I'm sure you'll enjoy very much Lisbon, it's a very beatiful city.