What pills are these?

They are yellow and have the #3 on them also on some it says 93 and under it says 150. On the Back it says Acetaminophen (Tylenol Right?) and Codeine, PHOSPHATE TABLETS (Whats this Mean) USP 300 mg... Packaged by UDL Labrotories.... is it safe to take 4 of these or will i die? Also what exactly is it and all the details cuz i dont want to take to much