Tracking Methylene Blue Alongside Peptides & GLP-1s
Methylene blue keeps showing up in the same routines as BPC-157, NAD+ and GLP-1 injections. It is not a peptide, it isn’t injected, and it has one interaction profile that genuinely matters. Here is how to log it so timing, cycling and side effects stay attributable, and why logging everything you take is the whole point.
Not medical advice. PeptideWiz is a tracking and organization tool. This page explains arithmetic and record-keeping only. It does not recommend methylene blue, any dose, or any protocol, and it does not replace the instructions of your licensed provider or the product label, which always take precedence.
First, what it is (and isn’t)
Methylene blue is a synthetic phenothiazine dye, first made in 1876, that is FDA-approved as an injectable (ProvayBlue) for acquired methemoglobinemia. Outside that use it circulates as a low-dose oral supplement based on research into mitochondrial electron transport, with a biphasic dose-response: the effects studied at low doses reverse at high ones. It is not a peptide. Nothing is reconstituted, there is no vial math beyond concentration, and it is taken by mouth as a solution or capsule. In a tracker it is a supplement-type item.
The one interaction that changes everything
Methylene blue is a potent, reversible inhibitor of monoamine oxidase A. Combined with drugs that raise serotonin, that can produce serotonin syndrome, which is why the FDA-approved label carries a boxed warning and the FDA issued a dedicated safety communication. The classes named include:
- SSRIs and SNRIs (fluoxetine, sertraline, escitalopram, venlafaxine, duloxetine and others)
- Tricyclic antidepressants and MAOIs
- Buspirone, mirtazapine, trazodone, vilazodone, clomipramine
- Tramadol, meperidine, dextromethorphan and several other serotonergic non-psychiatric drugs
The label also describes washout periods after stopping those medications before methylene blue is given. Two other label facts: it is contraindicated in G6PD deficiency (risk of hemolytic anemia), and it is not recommended in pregnancy. None of this is exotic; it is exactly the kind of thing that only gets caught when everything a person takes is written down in one place and shown to a prescriber.
Methylene blue and GLP-1s
People on semaglutide, tirzepatide or retatrutide ask about this most. There is no established pharmacokinetic interaction between methylene blue and GLP-1 receptor agonists. The practical overlap is symptoms: both cause nausea and GI upset, and GLP-1s slow gastric emptying, which can change how an oral dose feels. If you run both:
- Log nausea, headache and dizziness in the side-effect log against the specific item, not the day. A week of entries will usually show which compound is responsible.
- Note the time relative to your injection. A shot day plus a full methylene blue dose is a different data point from a mid-week dose.
- Blue-green urine is methylene blue, not the GLP-1, and not a problem. Add it once as a note so it doesn’t clutter side effects.
Methylene blue and peptides
The common stacks pair it with NAD+, BPC-157, TB-500 or growth-hormone secretagogues. Two tracking realities:
- Different routes, different schedules. Peptides are typically subcutaneous on a daily, weekly or on/off cycle; methylene blue is oral and often taken in the morning. Put them on separate schedules with their own reminders so a missed peptide dose and a skipped oral dose are recorded as what they are.
- Attribute effects to one item. If you add a new compound, change one thing at a time and give it a couple of weeks before adding the next. Adherence and measurement trends only mean something when you know what changed.
How to set it up in PeptideWiz
Type: supplement. Name it “Methylene blue” and set the dose in mg. Put the concentration and mL
(e.g. “1% · 2 mL”) in the directions so the math travels with the item.
Daily, specific days, or an on/off cycle. Give it a time separate from injections so the reminder is unambiguous.
Log each dose from Today, add side effects against the item, and check Progress after two weeks before changing anything else.
Everything you take, peptides, GLP-1, supplements and prescriptions, then lives in one exportable administration log. The PDF report is built for exactly the “here is what I take” conversation the interaction section above requires.
Sourcing note
Grade matters more with methylene blue than with most supplements. Aquarium and reagent products are not pharmaceutical-purity and can carry heavy-metal impurities; only USP grade is made and tested to the pharmacopeia monograph. GoBlueBrain is one supplier of USP-grade methylene blue; whatever the source, ask for a certificate of analysis and confirm the concentration on the bottle before using the dosing math guide.
Put your whole routine in one log with PeptideWiz →
Frequently asked questions
Can methylene blue be taken with semaglutide or tirzepatide?
There is no established pharmacokinetic interaction between methylene blue and GLP-1 receptor agonists, but both commonly cause nausea and GI upset, and GLP-1s slow stomach emptying. Whether the combination is appropriate for you is a decision for your provider; if you run both, log symptoms per item so you can tell which one is responsible.
Which medications are dangerous with methylene blue?
The FDA-approved label carries a boxed warning for serotonin syndrome with serotonergic drugs: SSRIs, SNRIs, tricyclic antidepressants, MAOIs, and others such as buspirone, mirtazapine, trazodone, tramadol, meperidine and dextromethorphan. The label also describes washout periods after stopping those drugs. Do not combine them without a prescriber’s explicit sign-off.
Who should not take methylene blue at all?
People with G6PD deficiency (methylene blue can trigger hemolytic anemia), anyone with a known hypersensitivity, and, per the label, it is not recommended in pregnancy. Those are label facts, not the whole picture; your provider knows your history.
Is methylene blue a peptide?
No. It is a small synthetic dye molecule (a phenothiazine), not a chain of amino acids. It is usually taken orally as a solution or capsule rather than reconstituted and injected, so it’s tracked as a supplement-type item, not a peptide vial.
How should I log methylene blue in a tracker?
As its own item with the dose in mg, the solution concentration in a note, and the time taken. Keep it separate from your peptides and GLP-1 so adherence, side-effect logs and reminders stay attributable to one compound.
Related tools & reading
Sources: ProvayBlue prescribing information, DailyMed · FDA Drug Safety Communication (2011) · MedlinePlus: Serotonin syndrome · MedlinePlus Genetics: G6PD deficiency · Rojas, Bruchey & Gonzalez-Lima, Prog Neurobiol 2012