How can you support your alcoholic parent in getting help? When is it time to drop the issue?

This can be kind of complicated and challenging. The most important thing is forming and maintaining appropriate boundaries with your parent. If their addiction is affecting you, you have every right to speak out about it and let them know. It’s not up to you to save your parent or manage their addiction for them. It’s like the old adage: you can lead a horse to water but you can't make them drink. If somebody wants to get sober and recover, then you can help them. But if they refuse help, there’s really not much that can be done and it may be time to drop the issue.