So every website and doctor talk about MT say the dosage is 100-140mg 3 times a day. Many also say that MT is not toxic at all. So if too much is taken, like Vitamin C, it is excreted out.
I do not know the brand you bought, what is the dosage written on it. I have Nature's Answer liquid form which suggests 175-350mg per day.
It also depends on other ingridients in the MT you bought. Since there is not much research done on side effects, I would start slow, say 50mg per day and build it up keeping notes of how you feel. Then figure out what limit can you tolerate (feel best at) and keep that as your dosage, we are all different. After I started MT I felt that my liver did well, I used to have very slight pain on my right side which is gone. I still do Liver Flush two to three times a year.
Also you do not say what conditions you have and why are you taking MT?