Your pharmasist or doctor will be able to tell you if this is safe, but the general info is no it's not recommended for use, there are safer alternatives and it's category B which means it should only be used if necessary for the mother's continued good health.
I found a quick bit of info on the victorian better health (government website): more info here http://www.betterhealth.vic.gov.au/bhcv2/b...af/2371147?open
These should be discussed with your doctor or the weight loss team you are working with. Many health professionals who work in the area would recommend a period of three to six months following your duromine program before considering pregnancy, especially to make sure that you maintain a healthy weight over this time. They may also recommend a health check and pre-conception blood tests after this period to make sure your body is well prepared for your second child.
Duromine is category B3. These drugs aren't recommended for use in pregnancy unless vital to the mothers continued health. This is what that cateogry means: Drugs which have been taken by only a limited number of pregnant women and women of child-bearing age, without an increase in the frequency of malformation or other direct or indirect harmful effects on the human foetus having been observed. Studies in animals have shown evidence of an increased occurrence of foetal damage, the significance of which is considered uncertain in humans.