Ritalin showing no effects?

Many psychoactive drugs, including those of the stimulant class such as methylphenidate (branded Ritalin), require a loading period to expire before a subjective change in cognitive functioning is noticed by the patient. While attack dosing with such drugs, as is common practice for amphetamine addicts or those who abuse cocaine, may precipitate an acute response that is noticed upon initial administration, the dosage prescribed by your doctor has been calculated with the intent of safely introducing a new chemical into your central nervous system as a means to prevent acute side effects, such as drug-induced anxiety, or even more perturbing, temporary psychosis. Likewise, the curved administration of Ritalin your doctor has established, in which the dosage is steadily increased, serves to facilitate this secure transit of the drug. Hence, patience is required upon starting such a regimen; should you garner no benefit from the drug within more than two weeks, a follow-up appointment with your doctor may be advisable, wherein he or she can tailor the dosage to be more potent. As it pertains to the symptoms you describe in your post, such functional deficits are unheard of during the course of stimulant administration; an energetic effect would be perceived that contradicts anhedonic symptoms such as fatigue. In addition, the dissociation or derealization you claim to be experiencing may simply be a product of the anxiety instigated by starting the drug.