As an agency nurse I made a medication error I did'nt realise a pain killer patch was a controlled drug. When I did'nt find the prescribed patch with the patients normal meds I looked in a cupboard which held additional medications that was not stored in there own individual cupboard. I failed to realise there was another cupboard which stored controlled drugs. I documented the drug as unavailable on 2 occasions. A month later I was challenged on this by the home manager who told me she had been inspected and the error was highlighted and she had been scored down for this. I was devastated and informed my agency as the home did the day after. I was then suspended and asked to completed a reflection and medication questionnaire. I am still awaiting outcome but have not worked since. The error was made whilst working in a dementia home I am used to working with mental health conditions such as schizophrenia. I am so disappointed with myself and I am de sated I might have caused this old person more misery than they should have. Does anybody know if this will mean me loosing my pin. I have never made an error before and have always been praised on my practice.