B767 flight crew reported the flight attendants felt ill and dizziness during flight.

Attributes
ACN	1524486
Time
Date	201803
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 230 Flight Crew Total 5530 Flight Crew Type 5172
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 12056 Flight Crew Type 1598
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Illness

Narrative:

At about an hour away from landing we received a call from a flight attendant informing us that four flight attendants in the rear of the aircraft were feeling dizzy. No passengers were affected that we know. We descended to 28;000 feet and gave some oxygen to the flight attendants which seemed to help. The flight continued without incident.

Original NASA ASRS Text

Title: B767 flight crew reported the flight attendants felt ill and dizziness during flight.

Narrative: At about an hour away from landing we received a call from a Flight Attendant informing us that four Flight Attendants in the rear of the aircraft were feeling dizzy. No passengers were affected that we know. We descended to 28;000 feet and gave some oxygen to the Flight Attendants which seemed to help. The flight continued without incident.

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.