A budget airline flight from Spain was diverted to Bournemouth after a woman who had packed her medication in the plane's hold suffered chest pains.
A flight from Alicante was diverted to Bournemouth
The Jet2.com Boeing 737, from Alicante, was bound for Leeds-Bradford Airport in Yeadon, when the woman - in her 60s - complained of shortness of breath.
She was taken to Bournemouth Hospital after the plane landed on Friday and is "feeling much better", said Jet2.com.
It added travellers should keep their medication in their "carry-on luggage".
"She was already showing signs of improvement in the ambulance, but was taken in for overnight observation as a matter of precaution," a Jet2.com spokesman said.
"We understand our customer is feeling much better and we wish her a speedy, full recovery.
"However, it is a timely reminder for any traveller on medication to keep their prescriptions in their carry-on luggage so that it is accessible at all times.
"It is also worth keeping a doctor's note with the medication so that it can be properly administered."
The plane, which was carrying 127 passengers, continued to Leeds-Bradford, the spokesman said.