Dyclonine Hydrochloride

Dyclonine: 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 2020-01

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

Rights Attribution-NoDerivatives 4.0 International

Download date 02/10/2021 09:46:40

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

Link to Item http://hdl.handle.net/10713/12103 Summary Report

Dyclonine Hydrochloride

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

January 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.

Table of Contents

REVIEW OF NOMINATIONS ...... 4 METHODOLOGY ...... 4 Background information...... 4 Systematic literature review ...... 4 Outreach to medical specialists and specialty organizations ...... 7 Survey ...... 7 CURRENT AND HISTORIC USE...... 8 Summary of background information ...... 8 Summary of literature review ...... 9 Summary of focus groups/interviews of medical experts and specialty organizations ...... 12 Summary of survey results...... 12 CONCLUSION ...... 14 APPENDICES ...... 15 Appendix 1. References...... 15 Appendix 2. Survey instrument ...... 16

Table of Tables

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

REVIEW OF NOMINATIONS Dyclonine hydrochloride (dyclonine HCl; UNII: ZEC193879Q) was nominated for inclusion on the 503B Bulks List by David Smith and Triangle Compounding Pharmacy. It was nominated for dental pain irritation and oral mucosal tissue pain via an oral mouthwash and rinse in strengths ranging from 0.5-1%. Reasons provided for nomination to the 503B Bulks List include the need for a product that can be used in patient who need anesthesia but want to avoid local infiltrations or blocks. Additionally, there is no FDA-approved dyclonine product commercially available.

METHODOLOGY Background information The national medicine registers of 13 countries and regions were searched to establish the availability of dyclonine/dyclonine HCl 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 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 dyclonine HCl; name variations of dyclonine HCl 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 dyclonine HCl. 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 December 21, 2018. The search included a combination of (dyclonine[TIAB] OR tanac[TIAB]) AND (pain[TIAB] OR anesth*[TIAB] OR treatment[TIAB] OR topical[TIAB] OR mucosal[TIAB] OR therap*[TIAB] OR oral[TIAB] OR rinse[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 dyclonine HCl or the implementation of dyclonine HCl 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 dyclonine HCl 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 dyclonine HCl compared to alternative therapies. Results Please refer to Figure 1.

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

Outreach to medical specialists and specialty organizations Using the indications from the nominations and the results of the literature review, five (5) medical specialties that would potentially use dyclonine were identified: dentistry, dermatology, gastroenterology, oral medicine, and pulmonology. 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. One (1) expert was contacted for interviews, of which one (1) accepted and zero (0) declined interviews. To determine if a formal interview was warranted, two (2) medical experts were provided the list of substances pertinent to their specialty via email, one is an MD specializing in gastroenterology and the other is an MD specializing in dentistry. The gastroenterologist replied that they do not utilize any of the substances listed. The dentist failed to respond to the interview request. No additional follow-up was considered necessary with these specialties. All 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 dentistry, dermatology, gastroenterology, oral medicine, and pulmonology, 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. An online survey was created using Qualtrics® software (Provo, UT). The survey link was distributed to eight (8) 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.

Table 1. Participating associations

Specialty Association

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

Oral Medicine American Academy of Oral Medicine (AAOM)

Table 2. Associations that declined participation

Specialty Association Reasons for Declining

Declined - ADA concluded that this issue does not affect enough dentists to Dentistry American Dental Association (ADA) warrant a significant investment of time”

Gastroenterology American Gastroenterological Association (AGA) Failed to respond

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

Pulmonology American Thoracic Society (ATS) Declined

CURRENT AND HISTORIC USE Summary of background information • Dyclonine HCl is available as an FDA-approved product. • Dyclonine HCl is available as an OTC product in the US. • There is a current United States Pharmacopoeia (USP) monograph for dyclonine HCl. • Dyclonine HCl is not approved in any of the foreign medicine registries searched.

Table 3. Currently approved products – USa

Active Ingredient Concentration Dosage Form ROA Status Approval Dateb

Dyclonine HCl 0.5-1% Solution Topical Prescription 11/20/2018 Abbreviation: ROA, route of administration. aSource: US FDA Approved Drug Products with Therapeutic Equivalence Evaluations (Orange Book). bIf multiple approval dates and/or multiple strengths, then earliest date provided.

Table 4. Currently approved products – select non-US countries and regions No approved products in the selected non-US countries and regions

Summary of literature review • Total number of studies included: 15 studies (6 descriptive, 8 experimental, and 1 observational). • Most of the studies were from the US (10 studies). • The most common indication for the use of dyclonine HCl in the US and non-US studies was topical anesthesia for various procedures. • Compounded products were identified from both US and non-US studies utilized in the nominated dosage forms.

Table 5. Types of studies

Types of Studies Number of Studies

Descriptive1–6 6

Experimental7–14 8

Observational15 1

Table 6. Number of studies by country

Country Number of Studies

China 11,14 2

Germany9,10 2

India 7 1

US1–6,8,12,13,15 10

Total US: 10 Total Non-US Countries: 5

Table 7. Number of studies by combinations No combination products were nominated

Table 8. Dosage by indication – US

Indication Dose Concentration Dosage Form ROA Duration of Treatment

25ml 1% Gargle Oral 2 doses Topical anesthesia - Awake endotracheal intubation2 5ml 1% Nebulizer Respiratory 5 mins

20ml (200 mg) 1% Gargle Oral Once Topical anesthesia – Bronchoscopy3 20ml (100 mg) 0.5% Solution Respiratory Once

Topical anesthesia - Burning mouth syndrome4 15ml 1% Rinse solution Oral 2 mins

Topical anesthesia - Painful lesions6 – 1% Cream Topical –

Topical anesthesia - Periodontal procedures5 5ml 1% Rinse solution Oral 1 min

Topical anesthesia - Radiation/chemotherapy induced stomatitis15 – 1% Solution Oral At least 1 day

– 1% Cream Topical – Pruritus1,6,12 – 0.5% Solution Topical –

Friedreich’s ataxia13 – 1% Solution Oral 7 days

IBS8 40mL 0.5% Enema Intrarectal Once

– 1% Cream Topical – Pain relief, minor burns, minor trauma, relief of postoperative discomfort, mucous anesthesia1 – 0.5% Solution Topical – Abbreviations: “–“, not mentioned; ROA, route of administration.

Table 9. Dosage by indication – non-US countries

Indication Dose Concentration Dosage Form ROA Duration of Treatment

Topical anesthesia - awake tracheal intubation10 0.5mg/kg 1% Solution Respiratory Once

Topical anesthesia - electronic transnasal flexible laryngoscopy11 10mL – Mucilage Oral 5-10 min

Topical anesthesia - intraocular ophthalmic surgeries7 – 0.5% Solution Ophthalmic Once

Histamine-induced bronchospasm in patient with bronchial hyperreactivity9 0.5mg/kg 1% Solution Respiratory Once

Chemical peeling for facial freckles14 2-3 mL 16g/1000ml Solution Topical Once Abbreviations: “–“, not mentioned; ROA, route of administration.

Table 10. Compounded products – US

Indication Publication Year Compounding Method Dosage Form Final Strength

• Dyclonine 1% with stearic acid 18%, polyethylene glycol 1000 monostearate 8%, polyethylene Pruritus12 1956 glycol 400 monostearate 5%, beeswax 2%, hydrous chlorobutanol 0.3%, and distilled water as much Cream 1% as is sufficient.

Table 11. Compounded products – non-US countries

Indication Compounding Method Dosage Form Final Strength

Chemical peeling for facial freckles14 • Dyclonine 16g with crystalline phenol 818g, camphor 2g, anhydrous alcohol 82mL, Solution 16g/1000ml glycerin 50mL and distilled water added to 1000mL

Summary of focus groups/interviews of medical experts and specialty organizations One (1) interview was conducted. Two (2) medical experts were provided the list of substances pertinent to their specialty via email, one is an MD specializing in gastroenterology and the other is an MD specializing in dentistry. The gastroenterologist replied that they do not utilize any of the substances listed. The dentist failed to respond to the interview request.

Table 12. Overview of interviewee

Level of Current Experience with Interviewee Specialty Interview Summary Response Training Practice Setting Dyclonine/Dyclonine HCl

Dermatology/ Independent • “I've never used it. I have no experience with it. I really can't comment. But, DER_05 MD No Immunology Consultant again, that’s bad bulk compounding use for the office.” Abbreviation: MD, Doctor of Medicine.

Summary of survey results Table 13. Characteristics of survey respondents [13 people responded to surveya]

Board Certification DMD/DDS MD No Response

Dermatology 0 1 0

Oral medicine 2 0 0

Pain medicine 1 0 0

Sleep medicine 1 0 0

No Response 0 0 10 Abbreviations: DMD/DDS, Doctor of Medicine in Dentistry; MD, Doctor of Medicine. aSome respondents reported more than one terminal clinical degree or board certification.

Table 14. Types of products used, prescribed, or recommended

Types of Products Respondents, n (N=2a)

Compounded 0

FDA-approved 0

Over-the-counter 0

Dietary 0

Unsure 0

No response 2 aOut of 13 respondents, two (2) reported using, prescribing, or recommending dyclonine product.

Table 15. Compounded use of dyclonine in practice No survey respondents provided this information

Table 16. Indications for which dyclonine is considered a standard therapy

Standard therapy Indication Compounded, n (N=0) Non-compounded, n (N=0) No response, n (N=2 )

No Response 0 0 2

Table 17. Reasons for using compounded product instead of the FDA-approved products No survey respondents provided this information

Table 18. Change in frequency of compounded dyclonine usage over the past 5 years No survey respondents provided this information

Table 19. Do you stock non-patient specific compounded dyclonine in your practice? No survey respondents provided this information

Table 20. Questions related to stocking non-patient specific compounded dyclonine No survey respondents provided this information

CONCLUSION Dyclonine HCl (UNII code: ZEC193879Q) was nominated for inclusion on the 503B Bulks List by David Smith and Triangle Compounding Pharmacy for dental pain irritation and oral mucosal tissue pain. It was nominated for dental pain irritation and oral mucosal tissue pain via an oral mouthwash and rinse in strengths ranging from 0.5-1%. Dyclonine HCl is available in the US but is not approved in any of the foreign medicine registries searched. From the literature review conducted, the most common indication in the US and non-US studies was topical anesthesia for various procedures. Compounded products were identified from both US and non- US studies utilized in the nominated dosage forms. From the interview, the interviewee did not have experience with dyclonine HCl so was not able to provide much information. Two (2) medical experts were provided the list of substances pertinent to their specialty via email, one is an MD specializing in gastroenterology and the other is an MD specializing in dentistry. The gastroenterologist replied that they do not utilize any of the substances listed. The dentist failed to respond to the interview request From the survey responses, two (2) out of 13 respondents used dyclonine HCl but none of the respondents used compounded products.

APPENDICES Appendix 1. References 1. Dyclonine hydrochloride. J Am Med Assoc. 1956;162(2):116-117. 2. Bacon G.S., Lyons T.R., Wood S.H. Dyclonine hydrochloride for airway anesthesia: Awake endotracheal intubation in a patient with suspected local anesthetic allergy. Anesthesiology. 1997;86(5):1206-1207. doi:10/d7nrsp 3. Clark G.D., Pond C. Adaptation of the de Vilbiss atomizer for the delivery of topical anesthesia. Nurse Anesth. 1992;3(1):20-24. 4. Formaker B.K., Mott A.E., Frank M.E. The effects of topical anesthesia on oral burning in burning mouth syndrome. Ann N Y Acad Sci. 1998;855:776-780. 5. Gargiulo A.V., Burns G.M., Huck C.P. Dyclonine hydrochloride--a topical agent for managing pain. Ill Dent J. 1992;61(4):303-304. 6. Shelmire B., Gastineau FM., Shields TL. Evaluation of a new topical anesthetic, dyclonine hydrochloride. AMA Arch Dermatol. 1955;71(6):728-730. doi:10/bk6xwq 7. Arora RB., SharmaVN., Kulshrestha PP. Clinical trial of dyclonine in intraocular ophthalmic surgery. Eye Ear Nose Throat Mon. 1955;34(9):593. 8. Greenwood B., Rodriguez S., Decktor D., Maton P.N., Robinson M. Irritable bowel syndrome: a study to investigate the mechanism(s) of visceral hypersensitivity. J Okla State Med Assoc. 1996;89(2):47-50. 9. Groeben H., Großwendt T., Silvanus M.-T., Pavlakovic G., Peters J. Airway anesthesia alone does not explain attenuation of histamine-induced bronchospasm by local anesthetics: A comparison of lidocaine ropivacaine dyclonine. Anesthesiology. 2001;94(3):423-428. doi:10/cbkgx7 10. Groeben H., Schlicht M., Stieglitz S., Pavlakovic G., Peters J. Both local anesthetics and salbutamol pretreatment affect reflex bronchoconstriction in volunteers with asthma undergoing awake fiberoptic intubation. Anesthesiology. 2002;97(6):1445-1450. doi:10/dtrmms 11. Jichao S., Cuida M., Mingxing C., Yunyun W., Dongdong Z. Oral dyclonine hydrochloride mucilage versus tetracaine spray in electronic flexible laryngoscopy: A prospective, randomized controlled trial. Am J Otolaryngol - Head Neck Med Surg. 2016;37(2):169-171. doi:10/f8drhf 12. Morginson WJ, Rich CO, Eskelson YD., et al. Dyclonine hydrochloride: A new topical antipruritic agent. Postgrad Med. 1956;19(6):605-607. doi:10/gf28zp 13. Sahdeo S., Scott B.D., McMackin M.Z., et al. Dyclonine rescues frataxin deficiency in animal models and buccal cells of patients with Friedreich’s ataxia. Hum Mol Genet. 2014;23(25):6848- 6862. doi:10/f6wjz6 14. Sun H.-F., Lu H.-S., Sun L.-Q., Ping W.-D., Mao D.-S., Li D. Chemical Peeling with a Modified Phenol Formula for the Treatment of Facial Freckles on Asian Skin. Aesthetic Plast Surg. 2018;42(2):546-552. doi:10/gc7fbf 15. Carnel S.B., Blakeslee D.B., Oswald S.G., Barnes M. Treatment of radiation- and chemotherapy- induced stomatitis. Otolaryngol Head Neck Surg. 1990;102(4):326-330. doi:10/gf28zn

Appendix 2. Survey instrument Start of Block: Welcome Page The University of Maryland Center of Excellence in Regulatory Science and Innovation (M-CERSI), in collaboration with the Food and Drug Administration (FDA), is conducting research regarding the use of certain bulk drug substances nominated for use in compounding by outsourcing facilities under section 503B of the Federal Food, Drug, and Cosmetic Act. In particular, we are interested in the current and historic use of these substances in clinical practice. This survey is for dyclonine. As a medical expert, we appreciate your input regarding the use of this substance in your clinical practice. This information will assist FDA in its development of a list of bulk drug substances that outsourcing facilities can use in compounding under section 503B of the Act. All responses are anonymous. OMB Control No. 0910-0871 Expiration date: June 30, 2022 The time required to complete this information collection is estimated to average 30 minutes, including the time to review instructions, search existing data sources, gather the data needed, and complete and review the information collection. An agency may not conduct or sponsor, and a person is not required to respond to a collection of information unless it displays a currently valid OMB control number. If you have additional questions or concerns about this research study, please email: [email protected]. If you have questions about your rights as a research subject, please contact HRPO at 410-760-5037 or [email protected]. End of Block: Welcome Page

Start of Block: Dyclonine Q1. What type(s) of product(s) do you use, prescribe, or recommend for dyclonine? Please check all that apply. ▢ Compounded drug product ▢ FDA-approved drug product ▢ Over the counter drug product ▢ Dietary supplement (e.g. vitamin or herbal supplement products sold in retail setting) ▢ Unsure Skip To: Q13 If What type(s) of product(s) do you use, prescribe, or recommend for dyclonine? Please check all th... != Compounded drug product Skip To: Q2 If What type(s) of product(s) do you use, prescribe, or recommend for dyclonine? Please check all th... = Compounded drug product

Display This Question: If What type(s) of product(s) do you use, prescribe, or recommend for dyclonine? Please check all th... = Compounded drug product

Q2. Please list any conditions or diseases for which you use compounded dyclonine in your practice. Please include the strength(s), dosing frequency(ies), dosage form(s), route(s) of administration, duration of therapy, and patient population (ex. age, gender, comorbidities, allergies, etc).

Strength(s) Dosing Dosage Route(s) of Duration of Patient (please frequency(ies) form(s) administration therapy population include units)

Condition 1 (please describe)

Condition 2 (please describe)

Condition 3 (please describe)

Condition 4 (please describe)

Condition 5 (please describe)

Q3. Do you use compounded dyclonine as a single agent active ingredient, or as one active ingredient in a combination product? Please check all that apply. ▢ Single ▢ Combination Skip To: Q5 If Do you use compounded dyclonine as a single agent active ingredient, or as one active ingredient... != Combination Display This Question: If Loop current: Do you use compounded dyclonine as a single agent active ingredient, or as one active ingredient... = Combination Q4. Please list all combination products in which you use compounded dyclonine.

______Q5. For which, if any, diseases or conditions do you consider compounded dyclonine standard therapy? ______Q6. Does your specialty describe the use of compounded dyclonine in medical practice guidelines or other resources? ______Q7. Over the past 5 years, has the frequency in which you have used compounded dyclonine changed? o Yes - I use it MORE often now (briefly describe why) ______o Yes - I use it LESS often now (briefly describe why) ______o No - use has remained consistent

Q8. Why do you use compounded dyclonine instead of any FDA-approved drug product? ______Q9. Do you stock non-patient-specific compounded dyclonine in your practice location? o Yes o No Skip To: End of Block If Do you stock non-patient-specific compounded dyclonine in your practice location? = No Display This Question: If Do you stock non-patient-specific compounded dyclonine in your practice location? = Yes Q10. In what practice location(s) do you stock non-patient-specific compounded dyclonine? Please check all that apply. ▢ Physician office ▢ Outpatient clinic ▢ Emergency room ▢ Operating room ▢ Inpatient ward ▢ Other (please describe) ______Q11. How do you obtain your stock of non-patient-specific compounded dyclonine? Please check all that apply. ▢ Purchase from a compounding pharmacy ▢ Purchase from an outsourcing facility ▢ Compound the product yourself ▢ Other (please describe) ______Q12. Why do you keep a stock of non-patient-specific compounded dyclonine? Please check all that apply. ▢ Convenience ▢ Emergencies ▢ Other (please describe) ______Skip To: End of Block If Why do you keep a stock of non-patient-specific compounded dyclonine? Please check all that apply. = Convenience Skip To: End of Block If Why do you keep a stock of non-patient-specific compounded dyclonine? Please check all that apply. = Emergencies Skip To: End of Block If Why do you keep a stock of non-patient-specific compounded dyclonine? Please check all that apply. = Other (please describe) Q13. For which, if any, diseases or conditions do you consider dyclonine standard therapy? ______Q14. Does your specialty describe the use of dyclonine in medical practice guidelines or other resources? ______End of Block: Dyclonine

Start of Block: Background Information

Q15. What is your terminal clinical degree? Please check all that apply. ▢ Doctor of Medicine (MD) ▢ Doctor of Osteopathic Medicine (DO) ▢ Doctor of Medicine in Dentistry (DMD/DDS) ▢ Naturopathic Doctor (ND) ▢ Nurse Practitioner (NP) ▢ Physician Assistant (PA) ▢ Other (please describe) ______Q16. Which of the following Board certification(s) do you hold? Please check all that apply. ▢ No Board certification ▢ Allergy and Immunology ▢ Anesthesiology ▢ Cardiovascular Disease ▢ Critical Care Medicine ▢ Dermatology ▢ Emergency Medicine ▢ Endocrinology, Diabetes and Metabolism ▢ Family Medicine ▢ Gastroenterology ▢ Hematology ▢ Infectious Disease ▢ Internal Medicine ▢ Medical Toxicology ▢ Naturopathic Doctor ▢ Naturopathic Physician ▢ Nephrology ▢ Neurology ▢ Obstetrics and Gynecology ▢ Oncology ▢ Ophthalmology ▢ Otolaryngology ▢ Pain Medicine ▢ Pediatrics ▢ Psychiatry ▢ Rheumatology ▢ Sleep Medicine ▢ Surgery (please describe) ______▢ Urology ▢ Other (please describe) ______End of Block: Background Information