Animal Hospital Sanity Guide: Every Gain and Drain
Sanity is Animal Hospital’s health system. Every player starts a run with 61-65% base sanity (some classes add more), and hitting 0% kills you. Nothing else damages you directly — every monster, event, and mistake in the game is expressed as a sanity number. Learn the numbers and you control the game.
Gaining sanity
| Source | Amount | Notes |
|---|---|---|
| Coffee | +15 total (+5 per sip, 3 sips) | Free from the coffee machine, or from the Supplies Shop; the most renewable source |
| Chocolate | +60 total (+20 per bite, 3 bites) | From the Supplies Shop, Liz’s quest, or 29 Robux at the reception office |
| Mint Tea | +15-30 over time | Supplies Shop item; restores gradually |
| Secretary class | +1 per patient checked in | Passive class perk |
| Doctor / Surgeon class | +1 per patient healed | Passive class perk |
| Tasing an anomaly or Mimic | +2 | Also drives them off |
| Completing a surgery | +1 | Room 8 minigame |
| Rain puddles (Rainy Shifts) | +1 | Step in the leak puddles |
Losing sanity
Passive and self-inflicted:
- Job stress: -1 every 50 seconds, always. From 100%, stress alone kills in 1 hour, 23 minutes, 20 seconds.
- Tasing a normal patient: -15
- Getting tased by a teammate: -2 for both of you
- Shooting a teammate with the Gun: -6
- Looking at a cursed photo: -10 (inspect polaroids on the desk instead of holding them)
Enemy attacks:
| Enemy | Sanity loss |
|---|---|
| Bed Monster | -10 when grabbed, -6 every 2 seconds while attacked |
| Stalker | -10 on looking at it |
| Mass of Eyes | -3 to -5 per second while looking at it |
| Hiders | -10 on attack |
| Mimic | -6 per bite (roughly every 0.5-1 second) |
| Head Banger | -20 when asked to leave (without coffee) |
| Camera Monster | -20 on jumpscare |
| Ghost | -2 on encounter, then -2 per second while near it |
Events:
- Standing near fire: -1 to -2 per second (level 3 Firefighters are immune)
- Extinguishing ritual candles without Eye Drops, IV Drops, or Coffee equipped: -1 to -3 per candle
What low sanity looks like
The game warns you before you die. Below 35%, the music slows down and the environment desaturates. Below 30%, the posters in Rooms 1, 2, and 7 begin to change, growing more disturbing the lower you go. Both effects reverse once you recover above the thresholds. Treat the desaturation as your cue to stop treating patients and go find coffee.
One class-specific wrinkle: with the Psychologist class equipped, all sanity changes — positive and negative — are doubled. Chocolate heals 120, but a Camera Monster jumpscare costs 40. High risk, high throughput.
Managing the economy
The math is forgiving if you respect it. Job stress costs 1.2 sanity per minute; one free coffee every few minutes more than covers it. What actually kills players are burst losses — a Stalker glance into a Head Banger dismissal is 30 sanity in seconds. So:
- Grab coffee the moment each shift starts so the machine brews the next cup during the shift.
- Keep a chocolate banked for after an enemy encounter, not before.
- Never tase on suspicion. A wrong tase (-15) costs as much as half a coffee cycle restores; confirm anomalies with the photo camera or scanner first, as covered in the how to play guide.
- Pick synergy classes for long runs. Secretary and Doctor turn your normal workflow into passive regen — more on that in the patients guide.
Sanity discipline is also what makes endless runs possible in the first place — see the shifts guide for how the game scales the pressure.
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