PHD is a passive item.
Effects[ | ]
- Identifies all pills upon pickup.
- Spawns a pill.
- Replenishes 2
Red Hearts. - Increases the payout of Blood Donation Machines to 2-3 coins on Normal mode and 2 on Hard mode.
- Increases the payout of IV Bag to 2-3 coins.
- Increases the payout of IV Bag to 2-3 coins on Normal mode and 2 on Hard mode.
- Converts some "bad" pills into their "good" counterparts or removes their bad effects:
| Pill | Changes Into |
|---|---|
| Stat down pill | Stat up pill |
| Amnesia | I can see forever! |
 ???
|
Telepills |
| Addicted
|
Percs! |
| I'm Excited!!!
|
I'm Drowsy... |
| Paralysis
|
Pheromones |
| Retro Vision
|
I can see forever! |
| R U A Wizard?
|
Power Pill! |
| X-Lax
|
Something's wrong... |
 Bad Trip
|
Full Health |
 Bad Trip
|
Balls of Steel |
| Experimental Pill
|
Only grants a stat up |
| Gold Pill
|
Only has positive effects |
| Unchanged | |
| 48 Hour Energy | |
| Bad Gas | |
| Bombs are Key | |
| Explosive Diarrhea | |
| Hematemesis | |
| I can see forever! | |
| I Found Pills | |
| Lemon Party | |
| Pheromones | |
| Pretty Fly | |
| Puberty | |
| Telepills | |
 Friends Till the End!
| |
| Infested!
| |
| Infested?
| |
| One makes you larger
| |
| One makes you small
| |
| Percs!
| |
| Power Pill!
| |
| Re-Lax
| |
 ???
| |
| Addicted!
| |
| Retro Vision
| |
| Feels Like I'm Walking on Sunshine!
| |
| Gulp!
| |
| Horf!
| |
| Something's Wrong...
| |
| Vurp!
| |
 Paralysis
| |
| R U A Wizard?
| |
Notes[ | ]
- Bad pills already obtained/dropped will be converted to their "good" counterparts.
- If PHD is lost in any way, such as rerolling by the D4 or a Dice Room, or dropping it as Tainted Isaac, pills will remain fully identified, but negative pills will not be converted.
- Performing a RERUN with a character that held PHD will still prevent negative pills from spawning, but will no longer identify pills until used.
- As bad pills will turn into good pills, it is possible for two different colored pills to have the same effect.
- Multiple copies of PHD will not yield more coins when using a Blood Donation Machine or IV Bag.
Interactions[ | ]
- False PHD: Pills can both be good or bad again. Taking a bad pill still applies the benefits from False PHD.
- Keeper / Tainted Keeper: Blood Donation Machines will not produce more coins and they will still have a chance to fail.
In-game Footage[ | ]
Trivia[ | ]
- PHD stands for Doctor of Philosophy (Ph.D.) and it's the most common degree at the highest academic level awarded following a course of study. Doctorates can be in any study, in Isaac's case, medicine.
- MEAT!, YO LISTEN!, PHD, G FUEL!, and TMTRAINER are the only ALL CAPS items in the game.
 The Binding of Isaac: Rebirth
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