Hi I'm Asking For A Friend Who Only A Week

Hi I'm asking for a friend who only a week ago after having a red swollen eye and a bad headache and pain was told she may have temporal arteritis she has had blood test and as been perscribed. 50mg of prednisolone . We are going away on holiday in 10 days time flying to the canaries and want to know if she will be able to go and ok to fly and if ok what precautions to take . Thankyou