I just found another Porphyria web site, and this one looks to be helpful as an introduction to the disease. Be sure to also look at the posts from November 02, 2016 and March 25, 2015.
To find and print out an entire list of drugs that have been rated in regard to Porphyria, go to the March 25, 2015 post, click the link under the American Porphyria Foundation, click the "Accept" button under the Database information, and then click the "...click here" link under the blank boxes on Drug Class, Type, etc. Be ready because the whole list is over 50 pages.
-J
