P is for Pilot.
Before a flight, you should always ask yourself, are you current (legal), proficient (capable), and safe (I.M.S.A.F.E.) to fly?
I.M.S.A.F.E. checklist:
Illness
Medication
Stress
Alcohol
Fatigue/Food
Emotions
Most common over-the-counter medications, FAA guide:
www.faa.gov/sites/faa.gov/files/licenses_certificates/medical_certification/medications/OTCMedicationsforPilots.pdf
