Is it possible to become intolerant to a medication over time?

Yes, it is possible for a person's body to become intolerant to a medication over time. This can happen as our bodies change and react differently to medications. In some cases, pharmacists can order laboratory tests to check if the medication is still suitable for a patient. However, it is important to note that not all medications can be tested in this way. In situations where a person is experiencing new symptoms or changes in their condition, adjustments to their medication may be made based on their description of the symptoms.