- Subject has taken more than 1 MPH treatment (for example, 2 or more different MPH treatments). Examples include but are not limited to RITALIN immediate release (IR) and EQUASYM IR; MEDIKINET IR and CONCERTA; RITALIN long-acting LA and CONCERTA. Note: this does not include subjects who have taken IR MPH for dose titration on a short-term basis (for example, £4 weeks) with an adequate response