Hi, I've Been On Ranitidine For About 3 Months, I've

Hi, I've been on Ranitidine for about 3 months, I've also been taking some probiotics for around the same amount of time. A couple of weeks ago I ran out of probiotics for a few days, during that time I began to have very watery thin stools, I assumed it was due to lack of probiotics and would go away once I started taking them again but after being back on them there has only been a slight improvement, stools aren't as runny but still very thin, just not sure what could be causing this?