My baby was born premature - 29weeks and 2 days...

My baby was born premature - 29weeks and 2 days genstation. Ive been doing my best to breastfeed but I'm just not making enough, so I do both...formula feeding until I have made enough breast milk to feed my little one then bottle feed it to him. A few weeks ago my home care nurse gave a sub for (10mg) Domperidone...I have been taking it ever since I got it...And it just doesnt work! It says to do so on a empty stomach and I do then I eat a few hours afterwards... Has anyone else been on Domperidone and found it not to work? Or if it has worked for you how did you take it? what was your routine like?