I am taking Mestinon for chronic fatigue and hypotension but it's doing the opposite currently, is it possible at the beginning of the treatment?

It is possible for some medications to initially cause symptoms that seem paradoxical, such as increased fatigue instead of increased energy. It is important to discuss any concerns or side effects with a healthcare professional, such as a pharmacist or doctor. They can provide guidance on how long to give a medication before determining its effectiveness and suggest alternatives if needed. Regular monitoring and communication with your healthcare team are important to ensure the best treatment outcomes.