Hi. The thing about IBS is that there are different types. So, more details would help. This is a general list of available treating medicines for IBS. https://www.mayoclinic.org/diseases-conditions/irritable-bowel-syndrome/diagnosis-treatment/drc-20360064
Here are some non medication things you can try:
Avoid foods that trigger your symptoms
Eat high-fiber foods
Drink plenty of fluids
Get enough sleep
They usually recommend redoing your diet as well.
As to medication, there are general things that they offer that aren't specifically for IBS but used. Most often for symptom management. Then there are at least 5 fully approved for IBS meds also.