Why does the drug not work?

You have not written what medicine you are referring to, so it is difficult to give a clear answer. However, when it comes to Baclofen tagged with the question, please read on. Baclofen contains an ingredient that is supposed to relax the muscles and thus help in diseases in which contractures and excessive muscle tension occur, such as. It is mainly about diseases of the nervous system. The direct effect of the drug is to reduce pain and enable or facilitate rehabilitation. The drug may not be effective due to the established dose, dosage, individual sensitivity or lack of cause on which it may work. For example, if the pain occurs without connection with increased muscle tone, its intake may not bring relief. In the absence of a feeling of improvement, it is best to consult the doctor who prescribed the preparation. I enclose a link where you can read more about Baclofen. Prescription products can be reserved at GdziePoLek and picked up stationary upon presentation of the prescription: https://www.gdziepolek.pl/produkty/8723/baclofen-polpharma-tabletki/apteki/w-warszawie