obsolete negative regulation of acetylcholine metabolic process (obsolete GO:0060410)
OBSOLETE. Any process that decreases the rate, frequency or extent of the chemical reactions and pathways involving acetylcholine, the acetic acid ester of the organic base choline. Acetylcholine is a major neurotransmitter and neuromodulator both in the central and peripheral nervous systems. It also acts as a paracrine signal in various non-neural tissues.