hi, thanks for choosing hcm, yes alternate diarrhoea and constipation may occur in ibs(irrespective of medication and diet) lomotil tablet can help you reduce diarrhoea(but dont use it always) Lifestyle changes can help in some cases of IBS. ex: regular exercise and improved sleep habits may reduce anxiety and help relieve bowel symptoms. Dietary changes can be helpful. However, no specific diet can be recommended for IBS, because the condition differs from one person to another. Talk with your doctor before taking over-the-counter medications. No one medication will work for everyone hope i answered your query feel free to contact me for further queries thank you