Can i ask my psychatrist to give me early refill prescription to get ritalin (methylphenidate) without visiting him each month? i can't afford the amount every month!

Hard to say: These medications are monitored closely by drug enforcement authorities and many locals have strict limitations on when and how much can be written at one time. You can review this with your doc, but in my state every dose written for you is reviewed by the authorities.

Regulations ; review: There are regulations with stimulant medications that require regular physician monitoring. The prescriptions cannot be called in to pharmacies -- they must be newly provided for each 30 day supply. There may be times like vacations, etc that can be planned ahead for, but you need to discuss these with your psychiatrist.