Drotin-M contains an antispasmodic (drotaverine) and a painkiller (mefenamic acid) which work by relaxing smooth muscles and reducing inflammation. Since it relieves your symptoms, the underlying cause is likely muscle spasms. The most common cause matching these symptoms is severe menstrual cramps (dysmenorrhea), which frequently trigger abdominal pain, nausea, and vomiting. Other possibilities include gastrointestinal issues like irritable bowel syndrome (IBS), gastroenteritis, or urinary tract spasms. While Drotin-M provides temporary relief, please consult a doctor for a proper evaluation and pelvic ultrasound to determine the exact cause.