Narrative:

First officer took a call from the flight attendant saying a passenger and all four flight attendants were lightheaded and dizzy. After we discussing the issue; and not seeing any issues in the cockpit; (cabin pressure); everything was normal. However; we did decide to lower the cabin temp. A message was sent to dispatch to call us with [maintenance]. [Maintenance] was no help.first officer called the flight attendant and got more info from them and then talked with medlink. I was the pilot flying trying to get lower altitude; however; ride reports below were light to mod turbulence. I decide to stay at FL360. Eventually; we did get down to FL280. Medlink call took forever. Flight attendant couldn't find the med that they were instructed to take. About this time; we were getting close to starting our descent. First officer stated he was getting a headache. He put his oxygen mask on. ATC started to slow us and vector us around. I felt we need to get on the ground as soon as possible. [We] went straight to [destination]. Paramedics met the plane.

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Original NASA ASRS Text

Title: B737NG Captain reported several crew members and a passenger were feeling lightheaded and dizzy for unknown reasons in cruise flight.

Narrative: First Officer took a call from the Flight Attendant saying a passenger and all four flight attendants were lightheaded and dizzy. After we discussing the issue; and not seeing any issues in the cockpit; (cabin pressure); everything was normal. However; we did decide to lower the cabin temp. A message was sent to Dispatch to call us with [Maintenance]. [Maintenance] was no help.First Officer called the Flight Attendant and got more info from them and then talked with MedLink. I was the Pilot Flying trying to get lower altitude; however; ride reports below were light to mod turbulence. I decide to stay at FL360. Eventually; we did get down to FL280. MedLink call took forever. Flight Attendant couldn't find the med that they were instructed to take. About this time; we were getting close to starting our descent. First Officer stated he was getting a headache. He put his oxygen mask on. ATC started to slow us and vector us around. I felt we need to get on the ground ASAP. [We] went straight to [destination]. Paramedics met the plane.

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.