Hi, Meftal Spas is a combination medication that contains dicyclomine and mefenamic acid. It is primarily used for the treatment of menstrual cramps and abdominal pain. It is not indicated for the treatment of stomach worms. Burning sensation in the vagina after taking Meftal Spas is not a known side effect of the medication. However, some women may experience burning or itching in the vaginal area due to an allergic reaction or irritation caused by certain medications. It is important to note that burning sensation in the vagina can also be caused by various other factors, such as infections (like yeast or bacterial vaginosis), sexually transmitted infections, vaginal dryness, or menopause. If you are experiencing a burning sensation in the vagina after taking Meftal Spas, you should stop taking the medication and consult your healthcare provider. They may recommend an alternative medication for your stomach worm or suggest other treatment options for your symptoms. If you require a personalized response, kindly use the Ask A Doctor service and post a follow-up. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician