Patient's Query
Hello doctor,
I am a 51-year-old woman experiencing frequent urination and urgency, especially at night. I wake up two to three times to urinate. I have had urine tests and an ultrasound, both of which were normal. My HbA1c is 5.6%, so I do not have diabetes.
My doctor suspects an overactive bladder and prescribed Mirabegron 50 mg daily, but I have not seen much change in two weeks. Also, I have been experiencing a mild headache since starting it.
So, my concerns are:
Could it be due to the drug?
Would pelvic floor therapy help in my case?
Are there dietary triggers I should avoid to manage these symptoms better?
Kindly suggest.
Hello,
Welcome to icliniq.com.
I understand your concern.
Thank you for reaching out. I understand how frustrating these symptoms can be, especially when they disturb your sleep and daily comfort. You have done the right thing by getting your basic investigations, such as urine tests, ultrasounds, and HbA1c (glycated hemoglobin), checked; it is reassuring that they came back normal.
Your doctor’s suspicion of an overactive bladder (OAB) is reasonable based on your symptoms, frequent urination, urgency, and nocturia (waking up at night to urinate), in the absence of infection or other structural issues. Mirabegron (50 mg) is commonly prescribed for an overactive bladder and works by relaxing the bladder muscle to increase its storage capacity. However, as with most medications, the response can vary from person to person.
It may take four to eight weeks for full benefits to be seen, but if you have noticed no improvement at all in two weeks and are experiencing a new headache, it is possible the medicine is not well suited to you. Headache is a known but not uncommon side effect of Mirabegron in some people.
Pelvic floor physiotherapy can be beneficial in your case. It helps retrain the bladder and strengthen the muscles that control urination. Many women with an overactive bladder find noticeable relief with a combination of behavioral therapy, bladder training, and pelvic floor exercises.
Regarding dietary triggers, several foods and drinks are known to worsen overactive bladder symptoms. Common ones include:
Caffeine (coffee, tea, cola).
Alcohol.
Spicy foods.
Artificial sweeteners.
Citrus fruits and juices.
Carbonated drinks.
It may help to keep a bladder diary to track what you eat or drink and when symptoms flare up. Staying hydrated is essential, but spacing your fluid intake and reducing intake two to three hours before bedtime can help reduce nighttime urination.
The probable causes can be overactive bladder syndrome, possibly idiopathic, aggravated by dietary triggers or lifestyle habits.
You need to get investigations such as a bladder diary (fluid intake and frequency chart) and a urodynamic study (only if symptoms persist despite therapy).
The differential diagnosis can be as follows:
Overactive bladder.
Nocturnal polyuria.
Caffeine-induced bladder irritation.
Mild bladder outlet obstruction (less likely with normal USG (ultrasound sonography)).
The probable diagnosis is overactive bladder (OAB), non-neurogenic, with suboptimal response to Mirabegron.
The treatment plan includes:
Continue Mirabegron for at least four more weeks if side effects are tolerable, but inform your doctor about the headache, dose adjustment, or switch that may be needed.
Start pelvic floor therapy (Kegel exercises) under a trained therapist’s guidance.
Dietary modifications as discussed above.
Bladder training techniques, such as scheduled voiding and urge suppression, may help.
If there is no improvement in a few more weeks, switching to another class of medication (like anticholinergics) or combining therapies may be considered by your physician.
If your symptoms persist or the headache worsens, please speak with your prescribing doctor about adjusting the medication. Meanwhile, starting pelvic floor therapy and making the above lifestyle changes may improve your symptoms significantly. Feel free to update me on your progress or ask further questions anytime. Wishing you relief and restful nights ahead!
Some preventive measures that can help you are
Avoid bladder irritants (caffeine, alcohol, citrus, and so on).
Maintain a healthy weight.
Do not limit fluids excessively; aim for proper hydration during the day, but reduce intake after 6 PM.
Perform pelvic exercises daily.
Empty bladder before bedtime.
I hope this helps.
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Answered by Education: MBBS Professional Bio: Dr. Usaid Yousuf is an expert in General Practitioner. He is experienced and well-versed in all treatment modalities of a General Practitioner. This doctor is not available for online consultations on the platform anymore. Dr. Usaid Yousuf
Medically reviewed byiCliniq medical review team
Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Usaid Yousuf
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