having had a particularly bad year for health this year, asthma, pneumonia and pericarditis all within 3 months i would test positive for steroids, numerous varieties of antibiotics, anti inflammatories, analgesics including opioids, thats without the ecchinaccea and other herbal remedies then you could suggest that as a nurse that on a regular basis has to crush tablets etc in order to administer them via a peg tube etc i may well have imbibed many a weird and wonderful drug no wonder i have developed an allergy to penicillin