Bipolar

I am sorry for you, but make your daughter your friend and explain to her about not taking medicines very politely and with all the love, I feel she will listen to you.

Talk to her and explain how important it is for her to take the medication. Tell her even if she does feel good the people around her are the ones that suffer. Get her some material about bipolar either from the library or the internet. Choose your words lovingly and not harsh, let her know you are concerned for her health in the future.

you should get her into therapy. If I am remembering correctly from my psychology classes, it is much more likely that medication will become ineffective if one constantly goes on and off it. Also, people who are bipolar tend to really get attached to the manic episodes because they feel really good, like they are high. That can also be dangerous because often they tend to feel they are invincible and can end up doing dangerous things. The best way to manage something like this is therapeutic treatment so that she will learn that even if she feels like she doesn't need the medication it is still better for her to continue taking it, because she will probably come to regret it later in life if she doesn't.