The described situation is kind of retarded to be honest. You have been sick all along but you don't feel it before you take a medicine? Even if this scenario described is correct I don't think that's the expected behavior it is not logical...

Well alcohol itself has disinfecting qualities, at least in real life. So I personally would consider not this be the case, it might be since we don't know the backgrounds how the game exactly is functioning, but that's why we are here to discuss and help developers to notice things that they just have overshot.

Well lingering on the topic that alcohol bottle is in damaged condition. To be honest this is a bigger topic overall that why some of the items have conditions when they should not have. Lets take example this alcohol bottle, if the bottle is broken, then it should be found empty. No other conditions should have any impact on the alcohol itself, since we all know that alcohol is a kind of substance that simply does not age unless the container is flawed and it slowly starts vaporizing away. So alcohol itself should be always in working condition unless the container is broken, same should go for the disinfectant spray since it is based on alcohol.