not unless you want a big shed. you need to take both at the same time for a while, unless you plant to start off with a good dose of dutasteride, then you can switch cold turkey. I have not seen graphs of just 0.5mg per day. But 1mg per day will cover you while you build up blood levels. i think after 4 days you can switch to once a day, though once a day might work from the beginning.
only problem is if you get side effects, it will be in your system a long time. so if you won't want to take that risk, taking them at the same time will let you try the dutasteride out a while and still have protection, before building up a high dose.
And as for that shed I mentioned, it is completely reversible. If you just swich cold turkey to dutasteride, and take a lower dose, like twice a week, your DHT levels will be higher than finasteride had them for part of the weak for the first 2 weeks. this may cause a bit of a shed. But the hair should grow back. Just look at the propecia graph in my avator. one group got off and it grew after they got back on. took 3x as long as they were off.