Thanks for using healthcare magic.
Your Positive test for morphine is due to methadone
Methadone is synthetic opioid , mainly used for opium de-addiction and as analgesic
in some countries.
So you may have positive test for morphine.
Many steroids including prednisolone
are used for treatment of acute asthmatic attack. So it is possible to have detection in sample.
I hope I have addressed your concern.