For anyone who may be interested:
I would be a little cautious about the sudden removal of betacaratine going in, but I'd feel happier to have it instantly withdrawn than carry on with too much.
Betacarotene is converted to Vitamin A which is fat-soluble so abrupt cessation will not have any immediate effect.
This seems to be a reasonably comprehensive article on the subject but I'm sure there will probably better ones out there on the internet. A word of caution though about using internet sites for medical information as not all of the information has been properly researched and there are many self-proclaimed experts out there. I am NOT one.
I've had a look at several articles but cannot find any reference to betacarotene being the cause of haemolysis.