Air carrier captain and tower controller reported another tower controller became ill will on duty.

Attributes
ACN	1592318
Time
Date	201811
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach Landing Taxi
Flight Plan	IFR
Person 1
Function	Other / Unknown
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 10
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 2466.47 Flight Crew Type 2466.47
Events
Anomaly	ATC Issue All Types

Narrative:

I was on break and got a call from a TRACON controller that the controller in the cab was experiencing some kind of medical episode. I ran upstairs to check on the controller and saw that the controller was unable to continue to work. There were many aircraft holding on the ground at the ramp and at the runway and a few taxiing aircraft as well. There were also aircraft holding with ZZZ. Normal operations were resumed within 5 to 15 minutes of me taking over. I don't believe without having more cpc's this can be avoided.

Original NASA ASRS Text

Title: Air carrier Captain and Tower Controller reported another Tower Controller became ill will on duty.

Narrative: I was on break and got a call from a TRACON Controller that the Controller in the Cab was experiencing some kind of medical episode. I ran upstairs to check on the Controller and saw that the Controller was unable to continue to work. There were many aircraft holding on the ground at the ramp and at the runway and a few taxiing aircraft as well. There were also aircraft holding with ZZZ. Normal operations were resumed within 5 to 15 minutes of me taking over. I don't believe without having more CPC's this can be avoided.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.