: Summary Report

Item Type Report

Authors Yoon, SeJeong; Gianturco, Stephanie L.; Pavlech, Laura L.; Storm, Kathena D.; Yuen, Melissa V.; Mattingly, Ashlee N.

Publication Date 2020-02

Keywords Methylcobalamin; Compounding; Food, Drug, and Cosmetic Act, Section 503B; Food and Drug Administration; Outsourcing facility; Mecobalamin; Drug compounding; Legislation, Drug; United States Food and Drug Administration

Rights Attribution-NoDerivatives 4.0 International

Download date 30/09/2021 20:33:43

Item License http://creativecommons.org/licenses/by-nd/4.0/

Link to Item http://hdl.handle.net/10713/12216 Summary Report

Methylcobalamin

Prepared for: Food and Drug Administration Clinical use of bulk drug substances nominated for inclusion on the 503B Bulks List Grant number: 2U01FD005946

Prepared by: University of Maryland Center of Excellence in Regulatory Science and Innovation (M-CERSI) University of Maryland School of Pharmacy

February 2020

This report was supported by the Food and Drug Administration (FDA) of the U.S. Department of Health and Human Services (HHS) as part of a financial assistance award (U01FD005946) totaling $2,342,364, with 100 percent funded by the FDA/HHS. The contents are those of the authors and do not necessarily represent the official views of, nor an endorsement by, the FDA/HHS or the U.S. Government.

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Table of Contents

REVIEW OF NOMINATIONS ...... 4 METHODOLOGY ...... 4 Background information...... 4 Systematic literature review ...... 5 Outreach to medical specialists and specialty organizations ...... 7 Survey ...... 7 CURRENT AND HISTORIC USE...... 10 Summary of background information ...... 10 Summary of literature review ...... 11 Summary of focus groups/interviews of medical experts and specialty organizations ...... 16 Summary of survey results...... 17 CONCLUSION ...... 20 APPENDICES ...... 21 Appendix 1. References...... 21 Appendix 2. Survey instrument ...... 28

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Table of Tables

Table 1. Participating associations ...... 8 Table 2. Associations that declined participation...... 9 Table 3. Currently approved products – US...... 10 Table 4. Currently approved products – select non-US countries and regions ...... 10 Table 5. Types of studies ...... 11 Table 6. Number of studies by country ...... 12 Table 7. Number of studies by combinations ...... 13 Table 8. Dosage by indication – US ...... 13 Table 9. Dosage by indication – non-US countries ...... 14 Table 10. Compounded products – US ...... 16 Table 11. Compounded products – non-US countries ...... 16 Table 12. Overview of interviewee ...... 16 Table 13. Characteristics of survey respondents ...... 17 Table 14. Types of products used, prescribed, or recommended ...... 17 Table 15. Compounded use of methylcobalamin in practice...... 18 Table 16. Indications for which methylcobalamin is considered a standard therapy ...... 19 Table 17. Reasons for using compounded product instead of the FDA-approved products ...... 19 Table 18. Change in frequency of compounded methylcobalamin usage over the past 5 years ...... 20 Table 19. Do you stock non-patient specific compounded methylcobalamin in your practice?...... 20 Table 20. Questions related to stocking non-patient specific compounded methylcobalamin ...... 20

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REVIEW OF NOMINATIONS Methylcobalamin (UNII code: BR1SN1JS2W) was nominated for inclusion on the 503B Bulks List by McGuff Compounding Pharmacy Services, Inc, The American Association of Naturopathic Physicians, Alliance for Natural Health, Integrative Medicine Consortium, American College for Advancement in Medicine, and David Smith. While the exact medical condition in which the compounded product is requested is generally unknown, methylcobalamin is generally indicated for the treatment of deficiency and associated pathologies arising therefrom, such as pernicious anemia. Methylcobalamin was also nominated for use in combination with chorionic gonadotrophin as a 1-5mg/mL injection for testicular atrophy and weight loss, refer to Table 7 for the nominated combination formulations. Additionally, methylcobalamin was nominated for treatment of vitamin B12 deficiency in patients with methylation issues, a treatment for autism spectrum disorder with methylation issues, gastrointestinal disorders, lack of intrinsic factor, , chronic fatigue syndrome, , multiple sclerosis, Parkinsonism, and pernicious anemia. Methylcobalamin will be compounded as a 1-10mg/mL multi-dose vial and a 20mg/mL preservative-free vial for intramuscular or subcutaneous injection. Reasons provided for nomination to the 503B Bulks List include: • There are no FDA-approved products with methylcobalamin as a single agent, or in combination with chorionic gonadotrophin in injection form • Compounded drug products are requested by prescribers to treat the individual needs of prescribers’ patients. • Methylcobalamin is a metabolically active form of vitamin B12 especially suited for neurological complaints. • has a significant boxed warning, side effects, and drug interaction profile. • Risperidone and aripiprazole are not FDA-approved to treat autistic syndrome disorder itself, only irritability associated with autism. • Risperidone and aripiprazole have a significant boxed warning and profile of CNS side effects in long-term use. • Thousands of patients with methylation issues, autism, chronic fatigue, fibromyalgia, multiple sclerosis, Parkinsonism, neuropathy, autoimmune, and heavy metal toxic syndrome are prescribed and use methylcobalamin daily.

METHODOLOGY Background information The national medicine registers of 13 countries and regions were searched to establish the availability of methylcobalamin products in the United States (US) and around the world. The World Health Organization, the European Medicines Agency (EMA), and globalEDGE were used to identify regulatory agencies in non-US countries. The medicine registers of non-US regulatory agencies were selected for inclusion if they met the following criteria: freely accessible; able to search and retrieve results in English language; and desired information, specifically, product trade name, active ingredient, strength, form, route of administration (ROA), and approval status, provided in a useable format. Based on these criteria, the medicine registers of 13 countries/regions were searched: US, Canada, European Union (EU), United Kingdom (UK), Ireland, Belgium, Latvia, Australia, New Zealand, Saudi Arabia, Abu Dhabi, Hong

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Kong, and Namibia. Both the EMA and the national registers of select EU countries (Ireland, UK, Belgium, and Latvia) were searched because some medicines were authorized for use in the EU and not available in a member country and vice versa. Each medicine register was searched for methylcobalamin; name variations of methylcobalamin were entered if the initial search retrieved no results. The following information from the search results of each register was recorded in a spreadsheet: product trade name; active ingredient; strength; form; ROA; status and/or schedule; approval date. Information was recorded only for products with strengths, forms, and/or ROA similar to those requested in the nominations. In addition to the aforementioned medicine registers, the DrugBank database (version 5.1.4) and the Natural Medicines database were searched for availability of over-the-counter (OTC) products containing methylcobalamin. The availability of OTC products (yes/no) in the US and the ROA of these products were recorded in a spreadsheet. Individual product information was not recorded.

Systematic literature review Search strategy Two databases (PubMed and Embase) were searched including any date through February 15, 2019. The search included a combination of (Methylcobalamin[TIAB] OR Mecobalamin[TIAB] OR "Methyl Vitamin B12"[TIAB] OR "Methyl Vitamin B 12"[TIAB] OR "Methyl B12"[TIAB] OR "Methyl B 12"[TIAB] OR Methycobal[TIAB] OR CH3-B12[TIAB]) AND (clinical[TIAB] OR therap*[TIAB] OR treat*[TIAB] OR deficien*[TIAB] OR methylation[TIAB] OR gastrointestinal[TIAB] OR pain[TIAB] OR neuro*[TIAB] OR neuropath*[TIAB] OR fatigue[TIAB] OR sclerosis[TIAB] OR parkinson*[TIAB] OR atrophy[TIAB] OR weight[TIAB]) AND (humans[MeSH Terms] AND English[lang]) NOT autism. Peer-reviewed articles as well as grey literature were included in the search. Search results from each database were exported to Covidence®, merged, and sorted for removal of duplicate citations. Study selection Articles were not excluded on the basis of study design. Articles were considered relevant based on the identification of a clinical use of methylcobalamin or the implementation of methylcobalamin in clinical practice. Articles were excluded if not in English, a clinical use was not identified, incorrect salt form, or if the study was not conducted in humans. Screening of all titles, abstracts, and full-text were conducted independently by two reviewers. All screening disagreements were reconciled by a third reviewer. Data extraction A standard data extraction form was used to collect study authors; article title; year published; journal title; country; indication for methylcobalamin use; dose; strength; dosage form; ROA; frequency and duration of therapy; any combination therapy utilized; if applicable, formulation of compounded products; study design; and any discussion surrounding the use of methylcobalamin compared to alternative therapies. Results Please refer to Figure 1.

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Figure 1. Summary of literature screening and selection (PRISMA 2009 Flow Diagram)

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Outreach to medical specialists and specialty organizations Using the indications from the nominations and the results of the literature review, 12 medical specialties that would potentially use methylcobalamin were identified: dermatology, endocrinology, gastroenterology, naturopathy, neurology, ophthalmology, otolaryngology, pain management, primary care, rheumatology, sleep medicine, and urology. Semi-structured interviews were conducted with subject matter experts within these specialties. Interviews lasted from 30-75 minutes and were conducted either via telephone or in-person. Criteria for selecting subject matter experts included recommendations provided by specialty professional associations, convenient geographic location, authorship within the specialty, or referral by an interviewee. Up to nine (9) interviews were conducted per substance. Four (4) experts were contacted for interviews, of which one (1) accepted. One (1) expert specializing in gastroenterology replied via email that methylcobalamin is used as a supplement in patients with vitamin B12 deficiency, but did not identify a need for a compounded product. Two (2) experts, one (1) specializing in otolaryngology and one (1) specializing in neurology failed to respond to the interview request. Interviews were recorded and transcribed via ©Rev.com. QSR International’s NVivo 12 software was utilized for qualitative data analysis. The University of Maryland, Baltimore IRB and the Food & Drug Administration RIHSC reviewed the study and found it to be exempt. Subject matter experts provided their oral informed consent to participate in interviews.

Survey General professional medical associations and specialty associations for dermatology, endocrinology, gastroenterology, naturopathy, neurology, ophthalmology, otolaryngology, pain management, primary care, rheumatology, sleep medicine, and urology, identified from the nominations, literature review, and interview, were contacted to facilitate distribution of an online survey. A Google™ search was conducted to identify relevant professional associations within each specialty. Associations were included if their members are predominantly practitioners, national associations, and organizations focused on practice within the US. Organizations without practicing physicians and state or regional organizations were excluded. The association’s website was searched in order to identify the email of the executive director, regulatory director, media director, association president, board members, or other key leaders within the organization to discuss survey participation. If no contact information was available, the “contact us” tab on the association website was used. The online surveys were created using Qualtrics® software (Provo, UT). Survey links were distributed to 21 associations. If an association had more than one (1) substance with indications relevant to that specialty, substances were combined into one (1) survey with no more than 14 substances per survey. Table 1 highlights the associations that agreed to distribute the survey link and Table 2 includes the associations that declined to participate. Additionally, single substance surveys were created and posted on the project website which was shared with survey participants. Participation was anonymous and voluntary. The estimated time for completion was 30 minutes with a target of 50 responses per survey. The Office of Management and Budget (OMB) approved this project.

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Table 1. Participating associations

Specialty Association

American Academy of Dermatology (AAD) Dermatology American Society for Dermatologic Surgery (ASDS)

Naturopathy American Association of Naturopathic Physicians (AANP)

American Society of Cataract and Refractive Surgery (ASCRS) Ophthalmology American Society of Retina Specialist (ASRS)

Pain Medicine American Academy of Pain Medicine (AAPM)

Primary Care American Academy of Environmental Medicine (AAEM)

Rheumatology American College of Rheumatology (ACR)

Sleep Medicine American Academy of Sleep Medicine (AASM)

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Table 2. Associations that declined participation

Specialty Association Reasons for Declining

American Association of Clinical Endocrinologists Declined, “endocrinologists are not Endocrinology (AACE) generally in the compounding space.”

Gastroenterology American Gastroenterological Association (AGA) Failed to respond

American Medical Association (AMA) Failed to respond Medicine American Osteopathic Association (AOA) Failed to respond

Neurology American Academy of Neurology (AAN) Failed to respond

Ophthalmology American Academy of Ophthalmology (AA) “I would take this off the list”

American Academy of Otolaryngology-Head and Failed to respond Neck Surgery (AAO-HNS)

Declined, stating that they did not think American Academy of Otolaryngic Allergy otolaryngologists were the target (AAOA) Otolaryngology market for the survey

Declined, stating they do not send out surveys unless they are requested by a American Rhinologic Society (ARS) member; unable to identify a member to request survey distribution

American Academy of Family Physicians (AAFP) Failed to respond Primary Care American College of Physicians (ACP) Failed to respond

Declined, “our physicians are inundated with surveys and I’m afraid Urology American Urology Association (AUA) you won’t be able to get the information you need”

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CURRENT AND HISTORIC USE Summary of background information • Methylcobalamin is not available as an FDA-approved product. • Methylcobalamin is not available as an OTC product in the US. • There is a current United States Pharmacopeia (USP) monograph for methylcobalamin. • Methylcobalamin is available in Abu Dhabi, Australia, and Hong Kong (see Table 4).

Table 3. Currently approved products – US No approved products in the US

Table 4. Currently approved products – select non-US countries and regionsa

Approved For Use Active Ingredient Concentration Dosage Form ROA Country Status Approval Dateb

Mecobalamin 0.5mg/mL Injection Hong Kong Prescription