My 1 month old daughter, constipated...?

My daughter is having a lack of BMs for almost a week and a half now. She has only gone once a day with help of suppositories. We used childrens suppositories we had cut in half as the dr advised but they weren't really working sufficiently except for putting stress on her. We have been using half a childrens pedia-lax liquid suppository and it works faster with less stress on her. I want to stop using them in fear of her becoming dependent. What can i do to relieve her constipation? Your advise is greatly appreciated.