Both Inspiral 20 SR Tablet and Concerta 54 mg Tablet contain methylphenidate, but they are not directly equivalent in terms of dose or release profile. Concerta uses a special release system called OROS (osmotic-controlled release oral delivery system) that provides a smoother, more gradual release of the medication over 12 hours, compared to the shorter, conventional delivery of Inspiral SR (sustained-release). Because of these differences, switching from Inspiral to Concerta without medical supervision may lead to under-treatment or over-treatment and can increase the risk of side effects and dependence. Your doctor will consider factors such as symptom control, duration of effect, side effects, and your response to the current medicine before making any change. Therefore, it is not advisable to switch on your own even though both medicines belong to the same drug class. Please discuss this with your prescribing doctor, who can safely adjust the dose or switch formulations if appropriate.