Looks like some math is in order. I recommend starting with 1mg and working your way up to 10mg. Do you have a micro gram scale?
The bottle contained 30ml and it lasted about a month. On the label it says a full dropper is 5mg and I did 10mg every morning.
https://www.merakimedicinal.com/products/meraki-blu-usp-grade-methylene-blue-150mg
Looks like some math is in order. I recommend starting with 1mg and working your way up to 10mg. Do you have a micro gram scale?
No, just grams.