Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Causes stomach problems

It barely gets your milk production up by taking the recommended dosage and if you try to take more like some people say to get it to work it can make you very sick to your stomach and you will spend more time on the toilet than pumping milk. It also makes you stink like overcooked maple syrup.I'd rather keep drinking my mother's milk tea and going to look for another supplement, this is just too harsh for me.