The scientists believe that by trying experimental treatments on patients we can cause deadly circumstances on the patient due to which the performance of experimental treatment on them is highly unethical. It might be that the experimental treatment might cure a certain disease but it might cause certain unknown conditions in the patient due to which his/her life gets endangered. Hence, it is against the ethical values to perform experimental treatments on the patients.
When you stomach builds up too much gastric acid you can take an antacid to Neutralize it. Antacids are a base used to Increase the pH level of the stomach fluids. Increasing the pH levels to about 7 will make it neutral. An example of an antacid would be Tums.