| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Erythema at injection site after Plegridy injection for the treatment of Multiple Sclerose. |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Development of redness after the injection of Plegridy for the treatment of Multiple Sclerose (MS). |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Skin and Connective Tissue Diseases [C17] | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| To evaluate the IRE mitigation effect of a single administration of Brimonidine tartrate in comparison with a vehicle gel (placebo). |  | 
| E.2.2 | Secondary objectives of the trial | 
| The secondary study objectives are to evaluate the IRE mitigation effect of a single administration of Brimonidine tartrate in comparison with a vehicle gel on a more stringent definition scale, in accordance with the primary endpoint of the original Brimonidine pivotal trials and patients’ satisfaction with the overall appearance of their skin. |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| - RRMS patients naive to treatment with SC interferon or oral and/or IV DMT for which PLEGRIDY is deemed necessary by the treating physician. - Patient and or legal representative is willing and able to understand the purpose and risks of the study and provide signed and dated informed consent.
 - Patient age 18 years or older.
 - Patient willing and able to complete PSA and PAA questionnaires with minimal assistance.
 - Development of injection site erythema with a score of 2 or higher on the PSA or CEA scale (occurring after first or second full dose of PLEGRIDY).
 |  | 
| E.4 | Principal exclusion criteria | 
| - Concurrent enrollment in any clinical trial of an investigational product. Participation in non-interventional study can be allowed as long as this participation does not interfere with this protocol or is likely to affect the subject’s ability to comply with the protocol. - Patients with history of any clinically significant cardiac, endocrinologic, hematologic, hepatic, immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, psychiatric, and renal, or other major disease, as determined by the Investigator.
 - Known allergy to any interferon or any component of PLEGRIDY (peginterferon beta-1a).
 - Patients with hypersensitivity to Brimonidine topical gel.
 - Patients with other skin disorders.
 - History of previous treatment with Brimonidine tartrate (either eye drops or Mirvaso).
 - History of drug or alcohol abuse (as defined by the Investigator) within 6 months prior to Day 1.
 - Active bacterial or viral infection.
 - Female subjects who are pregnant or currently breastfeeding.
 - Inability to comply with study requirements.
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| A change in either CEA or PSA scale measured as at least 1-grade improvement on CEA and/or at least 1-grade improvement on PSA scale assessed by the physician and patient, respectively, 6 hours after gel application, compared to the same measure before gel application. |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| E.5.2 | Secondary end point(s) | 
| - A composite change in both CEA and PSA scale measured as at least 1-grade improvement on CEA and 1-grade improvement on PSA respectively; This composite endpoint is considered to be sensitive enough and directly correlated with patients’ satisfaction therapy outcomes. CEA and PSA assessments will be performed before gel application, and then 6 hours after gel application at the physician’s office.
 - A composite change in both CEA and PSA scale measured as at least 2-grade improvement on CEA and 2-grade improvement on PSA;
 - Subject’s self-assessment of satisfaction with the overall appearance of their skin by using a Patient’s Assessment of Appearance (PAA) grading scale.
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | No | 
| E.6.4 | Safety | No | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | No | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | No | 
| E.7.4 | Therapeutic use (Phase IV) | Yes | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | No | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | Yes | 
| E.8.1.5 | Parallel group | No | 
| E.8.1.6 | Cross over | Yes | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | No | 
| E.8.2.2 | Placebo | Yes | 
| E.8.2.3 | Other | No | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 5 | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.7 | Trial has a data monitoring committee | No | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years |  | 
| E.8.9.1 | In the Member State concerned months | 11 | 
| E.8.9.1 | In the Member State concerned days |  |