The 'drugs' group
These nouns refer to drugs or medicine. We include here dialysis, which indicates a treatment. This use is productive: the names of other drugs can be used with this pattern.
on amphetamines on cocaine on dialysis on drugs on ecstasy on heroin on medication on skunk on steroids on tranquillizers
They probably think I'm on drugs or something.
I never went out when I was on heroin.
Her GP put her on tranquillisers.