What Does LAI Mean in Medical Terms?

LAI stands for long-acting injectable. Medicine given by injection that works over weeks.

Where you will see LAI

You will most often see LAI in mental health assessments and care plans, medication orders and prescriptions.

Example

A medication order might be written with “LAI” as shorthand for long-acting injectable.

Related abbreviations

• 1:1 — one-to-one observation
• 3% saline — three percent saline (hypertonic)
• 4-point restraints — four-point restraints
• 4AT — 4 A's test
• 5-FU — fluorouracil
• 5150 — 5150 hold (California)
• 5150 hold eval — 72-hour hold evaluation
• 6-MP — mercaptopurine

Browse the full Medical Abbreviations guide — 5,715 entries, searchable A–Z and by specialty.