The Binding of Isaac Wiki


921pages on
this wiki
Add New Page
Talk8 Share

A certificate with "PHD" written on it.


Isaac wears a surgeon's mask.

Changes the effects of all negative Pills to their positive counterparts. Neutral pills, such as Bad Gas, are not affected. Restores two Heart Containers on pick up. Has a 1/150 chance to identify the pill that is currently being held every frame.

If Telepills has not yet been identified as a pill in the current run (i.e. if the player has not yet used a Telepills), PHD guarantees that Telepills cannot show up in the current run.

Also increases coin payout from the Blood Donation Machine and IV Bag from 1-3 to 2-4.

PHD has the potential to be a very powerful starting item, as it turns most pills into permanent stat increases.


1HE3 TWCZ Found in the first floor treasure room



  • PHD is an abbrevation for 'Philosophiae Doctor' (Latin for 'Doctor of Philosophy').

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.

Also on Fandom

Random Wiki