Patients suffering from Parkinson’s disease or Parkinson’s syndrome know that after taking Medopa or Synthroid for a period of time, the effect becomes less effective than before, so what should be done? Without a doubt, it is to increase the dosage of Medopa or Synthroid. It is inevitable that when it is increased to a certain level, the effect will still be bad. Why is that? This is because the sensitivity of the drug receptors is getting worse as the blood drug concentration increases. For this reason, for patients, the dosage of dopamine preparations should not be increased at will, but must be used scientifically under the guidance of a doctor. Once the dopamine dosage is high and the effect is not good, it is necessary to seek medical attention for dopamine drug effect enhancement therapy. This is very critical.