B737-800
Physiological - Other
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Illness / Injury; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft
Upon boarding I noticed a very strong odor resembling raid or type of pesticide. The Number 2 also smelled it. I asked the Number 1; she said yes that it's constant with ZZZ trips to kill cockroaches. During flight inbound I also smelled it and experienced burning eyes; runny nose and slight headache. Symptoms continued. Upon boarding this specific flight same situation.Same symptoms but got worse. Toward end of first service everything went black; and I felt as if I was going to faint. Then plane was spinning and I felt nauseated. I finished last few rows and went up front. The Number 1 asked me to sit in cockpit where they gave me O2.After a while it did help a little. I hydrated and continued on. 30 minutes later I was advised by a passenger that another passenger had fainted in [the] aisle. I immediately ran to passenger and began procedures. Paramedics met our flight and removed the passenger.
B737-800 Flight Attendant reported fumes in the cabin which resulted in adverse health issues to the reporter and a passenger.