Download the BNF from your app store.
BNF =British National Formulary. Used by all pharmacists across the UK, a GP recommended it to me - its free!!
Search ANY drugs you're taking, and it warns of interactions with others, maximum dosage, side effects, etc, etc.
I like to know what I'm taking so this is great for me.
Hope it helps you.

Oramorph is an opiod based on morphine. It's primarily a pain killer but could be prescribed for COPD because it would suppress any pain associated with breathing and probably supress anxiety associated with being sob.