Date: 201911
Local time of day: 0601-1200
Location: ZZZ.ARTCC, US
Flight conditions: VMC
Aircraft: B737 Undifferentiated or Other Model
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Cruise
Airspace: Class A ZZZ
ATC / advisory: Center ZZZ
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Communication Breakdown
Anomaly: Flight Deck / Cabin / Aircraft Event Illness / Injury; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Detector: Person Flight Attendant; Person Passenger
When detected: In-flight
Result: Flight Crew Overcame Equipment Problem
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: About an hour into our flight over ZZZ; the Purser FA X and the Galley FA Y called and complained they both felt dizzy. They were blaming the poor air quality in the cabin. I asked if they smelled anything; any other symptoms; or was it something they ate. They replied; no but they were going to ask a passenger if they felt OK.They called back and said they asked a passenger if they felt dizzy. According to them; the passenger said; 'Why yes - a little.' I was taking this seriously; but I felt like it was a leading question. Sorry I don't have the passenger's name.I asked if they were able to complete their tasks and they said yes. They also stated the two flight attendants in the back were fine. My First Officer and I discussed a plan in case they felt worse. We called for a bathroom break to step back in the galley to see if there was anything we could smell or feel. I felt nothing when I stepped back. I explained to Y the air she is breathing is the same as what they have in the back of the aircraft. When I returned to the flight deck; my First Officer starting discussing divert plans and we should divert. I felt like he was pushing me too much. I told him I have nothing to go on other than they are stating they feel a little dizzy. I also stated that if one of them passes out or complains of other symptoms; then we will consider it then.Since the flight attendants were able to perform their duties; I saw no reason to divert. My First Officer then began to push me again about whether they should continue to fly their next leg. I told him that is not our decision - that is theirs.The flight attendants then went on portable oxygen and said they felt better. We continued on to ZZZ1.When we landed; my First Officer felt it was important to ask if they were able to perform their duties. I ignored him as I was taxiing the aircraft. When we parked and completed our checklist; I told him not to ask and our duties are complete. If you speak with them; it will open a Pandora Box.Leaving the aircraft; my First Officer began to speak with them. I told him lets go and waited at the top of the jetway. We headed to the van. While in the van; he stated now the flight attendants were complaining the door leaked and possibly other issues. I was very irritated and now I am unable to look and justify the needed fixes. By the way; I intended to brief the next Captain; but the crew was not there.I again reiterated to my First Officer our duties are done. I felt he was irritated. When we arrived at the hotel; I asked him if we are ok and if he understands. He said yes.This was very frustrating. I understand the flight attendants - but to have a First Officer undermine me was very disturbing.




Synopsis: B737 Captain reported Flight Attendant notified them of fumes and associated health issues by passengers and cabin crew.