'antisialogogic' is formed from the prefix 'anti-' (from Greek 'anti-', meaning 'against') plus 'sialogogic', ultimately relating to 'sialo-' (Greek for 'saliva') + '-gogic' (from Greek 'agogos', meaning 'leading' or 'bringing').

The element 'sialo-' comes from Greek 'sialon' meaning 'saliva' and combined with Greek 'agogos' produced Neo-Latin/medical terms such as 'sialogogue' (a substance that promotes saliva). Adding the prefix 'anti-' produced 'antisialogogue'/'antisialogogic' in modern medical English to denote the opposite action.

Originally the Greek components described 'leading or bringing forth saliva' (i.e., promoting salivation); over time, English formed both positive terms (sialogogue) and negative forms (with 'anti-') so that 'antisialogogic' now means 'opposing or inhibiting salivation.'