http://easa.europa.eu/system/files/d...bin%20crew.pdf
Page 5 of this document states:
AMC1 MED.A.020 Decrease in medical fitness
If in any doubt about their fitness to fly, use of medication or treatment:
(a) holders of class 1 or class 2 medical certificates should seek the advice of an AeMC or AME;
If in doubt, contact your AME
