Had an over protective mother when i was younger and was on anti histamins which were never taken! Got throught the 6th form scholarship for pilot , everything was sweet until they checked my med record. argued the case by gettin a cat test showing i was not allergic to anything ( private hosp will do it for £100 or so) and scholarship reinstated. 7 years later all is hunky dory! As long as you can prove there is no prob with it dont sweat it. Best of luck!