What are the functional groups in Vicodin?

The functional groups are hydroxyl, aromatic ring, and amide

Amide, phenol, aromatic ether, ketone, and tertiary amine.

Explanation:

Vicodin is a combination of two pain relievers: acetaminophen (Figure A) and hydrocodone (Figure B).

Acetaminophen contains two functional groups:

An amide group (1) A phenol group (2)

Hydrocodone has four functional groups:

Two aromatic ethers (1 and 2). A ketone (3) A tertiary amine (4)