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I recently started taking Methenamine Mandelate 1000mg Tabs to prevent urinary tract infections. The medication works by releasing formaldehyde in the urine to kill bacteria, but it requires your urine to be acidic for it to work properly. I've read about some serious side effects and also some common ones like upset stomach. I'm curious if anyone else has taken this medication, and if so, what was your experience like? Did you have any side effects? What steps did you take to keep your urine acidic for the medication to work?

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last active 3h ago
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Comments (7)

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eric_reyes4d ago

How long do you have to take this before you notice an improvement? I've been taking it for a week and I'm not sure if it's working.

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nina_kowalski3d ago

My doctor told me to take a vitamin C supplement to help keep my urine acidic. That seemed to work well for me.

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nicholas_schmidt3d ago

If you're experiencing any of these side effects, just go see your doctor. No need to suffer through it if it's making you miserable.

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scott_robinson3d ago

Just curious, does this actually eliminate the bacteria or just stop it from multiplying?

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martha_lane3d ago

I switched to a different medication because of the side effects and the diet restrictions. Just wasn't worth it for me.

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judith_moreno3d ago

I've been on this for a few months. It's been great for preventing UTIs, but I do make sure to drink plenty of cranberry juice to keep my urine acidic. No serious side effects so far, just the occasional upset stomach.

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stephen_sanders3d ago

I've had good luck with this one, so far. I do have to monitor what I eat a bit more than usual, but it's not too bad.