3. How to use Hepa-Merz?Hepa-Merz is a medicinal product that accelerates the excretion of ammonia from the body by increasing the synthesis of urea in the liver. In addition, it contributes to the accelerated release of ammonia from the tissues outside the liver. Hepa-Merz is used to treat concomitant and subsequent complications due to impaired liver detoxification function (e.g. cirrhosis of the liver) Always take Hepa-Merz granules exactly as your doctor has told you. If you are unsure about something, ask your doctor or pharmacist . Unless otherwise prescribed, the usual dose is: 1-2 sachets up to 3 times a day.