Possible Clues:

• __ screen: medical test for poisons, etc
• Food safety subj
• ___ screen (drug test)
• Poison sci
• __ screen: medical test
• How drunks drink
• Study of poisons: Abbr.
• __ screen: health care test for poisons, drugs, etc.
• Medical examiner's subj.
• Poisonous: Prefix