No, no person is a animal and it's misguided and inappropriate to make the comparison.
People who behave cruelly aren't animals, they're people who behave cruelly and we should seek to minimize/stop their cruelty and ability to inflict it.
Drug users, willing or no, also aren't animals. Drug users who want to stop should be given all the tools necessary to kick their habits. Drug users who don't want to stop should be given the tools necessary to reduce the harm to themselves and to society.
People who behave cruelly aren't animals, they're people who behave cruelly and we should seek to minimize/stop their cruelty and ability to inflict it.
Drug users, willing or no, also aren't animals. Drug users who want to stop should be given all the tools necessary to kick their habits. Drug users who don't want to stop should be given the tools necessary to reduce the harm to themselves and to society.
Anything else is barbaric.