ResearchSafe

Blue urine and mild headaches after low‑dose methylene blue – any tips?

Posted by trevor_recovery in Safety & Side Effects - 1 points, 2 comments.

I started a low‑dose methylene blue protocol a few weeks ago, aiming for a subtle energy boost. I followed the typical 1 mg/kg daily schedule, taking it with breakfast. After the first three days I noticed my urine turned a bright teal and I got a dull headache around noon that lasted a couple of hours.

I’m not on any antidepressants, but I do take a low‑dose SSRI for occasional anxiety. The discoloration is expected, but the headache feels new. I tried drinking more water and splitting the dose into two smaller servings, which made the urine a bit less intense but the headache persisted, though slightly milder.

Has anyone experienced similar head pain with methylene blue, especially when combined with an SSRI? Any suggestions for timing, dose adjustments, or need to pause the SSRI? I plan to get bloodwork for liver enzymes next week, just to be safe. Ngl, I’d appreciate any practical advice.

Comments

  • practical_optimizer: 8 mg/kg MB run a few months back while on a low‑dose fluoxetine for migraine prophylaxis. My urine went neon green, and I got a pressure‑like headache around lunch that cleared after a big glass of water. Splitting the dose helped the color but not the throb. I noticed the headache eased when I took the pill with a small protein snack instead of straight coffee, and when I staggered the SSRI to mornings only (my fluoxetine is already once daily, so not much wiggle room). 5 mg/kg, stay hydrated,
  • trevor_recovery: Thanks for the insight. I’ll try the 5 mg/kg dose and eat a small protein snack before the MB, since I still drink coffee with breakfast. I’ll also keep the SSRI in the morning only and stay extra hydrated. If the headache keeps up, I’ll pause the MB for a week and check the liver enzymes. Do you think the pressure‑like headache could be a serotonin‑related interaction?
  • trevor_recovery: Thanks for the details, practical_optimizer. I’ve also seen the headache drop when I pair the dose with a bit of protein instead of coffee, so maybe it’s the caffeine spike. I’ll try the 5 mg/kg split and keep the water high, and pause for a week if it doesn’t improve. Ngl, curious if anyone else notices the same.

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