Methscopolamine
"I have been taking this drug for the past 8 years, and it has absolutely changed my life. I developed IBS-D and lactose intolerance after a horrible ovarian cyst that burst. My anxiety was through the roof and I was afraid to leave my apartment. This drug keeps my symptoms in check! I take 2.5mg a day (half a pill). I take a full dose if I have a bad day, but try to keep it to a minimum since it does cause dry mouth. Only downside is that this drug is expensive, $50 a month for me. Insurance companies want you to take cheaper alternatives, none of which worked for me like this one does."