A Study of Suboptimally Controlled Participants Previously Taking Injectable DMDs for RMS (CLICK-MS)

Inclusion Criteria:

Male or female participants greater than or equal to (>=)18 years
Signed informed consent
Have diagnosis of RMS including RRMS and aSPMS and satisfy the approved indication for cladribine tablets as per United States Prescribing Information (USPI)
Have time since diagnosis of RMS of at least 12 months
Had received their last previous injectable disease-modifying drug (DMD) for at least 3 months
Have decided to initiate treatment with cladribine tablets during routine clinical care
Meet criteria as per the approved USPI
Have access to a valid e-mail address
In the opinion of the Investigator, experienced suboptimal response (lack of effectiveness, intolerability, poor adherence) to injectable DMD treatment

Exclusion Criteria:

Have been previously treated with cladribine in any dosing form
Transitioning from previous injectable DMD solely for administrative reasons such as relocation
Have comorbid conditions that preclude participation
Have any clinical condition or medical history noted as contraindication on USPI
Are currently participating in an interventional clinical trial
Pregnant or breastfeeding women, women who plan to become pregnant or men whose partner plans to become pregnant during the cladribine treatment period