Hygienic Labs, LLC
FDA issued a warning letter to Hygienic Labs, LLC (Denver, CO, United States) on Sep 19, 2023. Subject: Refusal to Provide Access to and Copying of Records.
From the letter: “Because your OTC drug firm failed to respond to the section 704(a)(4) records requests and associated communication attempts, we have no indication of the level of quality assurance for drugs registered as manufactured at your facility.”
At a glance
What a reviewer notes before reading: findings, citations, the response deadline and what the letter warns of.
- Violations
- 1 finding · 1 issue type
- Cited
- No CFR or ISO section
- Response due
- Not stated in the letter
- FDA asks for
- 2 actions
- Named as possible actions
- Refusal of admission
- Issued by
- Center for Drug Evaluation and Research
- Published status
- No close-out recorded
AI assisted findings
Model-assisted reading of each issue. Open one to see the FDA text it comes from, and check it against the full letter.
01Records & data integrityThe firm failed to respond to FDA's section 704(a)(4) records requests and all follow-up communication attempts.
Because your OTC drug firm failed to respond to the section 704(a)(4) records requests and associated communication attempts, we have no indication of the level of quality assurance for drugs registered as manufactured at your facility.
What FDA requested
- Respond to this letter within 48 hours to confirm or update your registration and/or drug listing status and indicate whether you will respond to the request for records and other information.
- If you are no longer manufacturing drugs, delist all the drugs previously listed with FDA, using the last lot expiration date as the marketing end date of the product, and deregister your facility accordingly.
FDA Warning Letter
16 paragraphs · 1 sectionText as published on FDA.gov, retrieved Sep 8, 2026. Layout added for reading; the wording is FDA’s. View on FDA.gov (opens in a new tab)
1Letter text
9 paragraphs
Your firm is registered with the United States Food and Drug Administration (FDA or Agency) as a manufacturer of over-the-counter (OTC) drug products; specifically, products listed included (b)(4). On September 27, 2022, the FDA sent an electronic request for records and other information pursuant to section 704(a)(4) of the Federal Food, Drug, and Cosmetic Act (FD&C Act), 21 U.S.C. 374(a)(4), to the contact email address provided in your registration file. This request went unanswered, as did a second email request sent on October 12, 2022. An FDA representative then attempted to contact your firm by phone on December 8, 2022, but was unable to leave a message. A second attempt to contact you at the phone number listed on your website was made on December 14, 2022, but the number listed did not provide an opportunity to leave a voicemail. The Agency then sent a follow-up written request for such records and other information via UPS that was delivered to the physical address provided in your registration file on February 7, 2023. Delivery to you was confirmed by the shipper, but you failed to respond. We made a final attempt to contact you by phone on September 15, 2023, but received various automated messages indicating that 833-773-7587 is no longer in service. Pursuant to section 704(a)(4), FDA’s request for records and follow-up communication included a sufficient and clear description of the records sought.
It is a prohibited act under section 301(e) of the FD&C Act (21 U.S.C. 331(e)) to refuse to permit access to or copying of any record as required by section 704(a).
Because your OTC drug firm failed to respond to the section 704(a)(4) records requests and associated communication attempts, we have no indication of the level of quality assurance for drugs registered as manufactured at your facility.1
Respond to this letter within 48 hours to confirm or update your registration and/or drug listing status and indicate whether you will respond to the request for records and other information. If you are no longer manufacturing drugs, delist all the drugs previously listed with FDA, using the last lot expiration date as the marketing end date of the product, and deregister your facility accordingly.
The Agency may conduct an inspection to verify information provided and/or to evaluate the compliance of your manufacturing operations.
(b)(4)
You may provide additional information for our consideration as we continue to assess your activities and practices.
Send your electronic reply to CDER-OC-OMQ-Communications@fda.hhs.gov.
Identify your response with FEI 3017242852 and ATTN: Rokhsana Jazi.
Citations and trends
Each 21 CFR section, ISO 13485 clause and issue type in this letter, how often it appears across all letters, and its trend by the year FDA issued the letters. 2026 runs to Nov 3, 2026, compared with the same dates last year. Select a row or a bar to see those letters in Letters. As cited in this historical letter, not a statement of current requirements.
This letter cites no 21 CFR section or ISO 13485 clause.
Issue types
Record details
- Issuing center
- Center for Drug Evaluation and Research
- Issuing office
- Center for Drug Evaluation and Research
- Location
- Denver, CO, United States
- Letter posted date
- Oct 17, 2023
- Letter issue date
- Sep 19, 2023
- Addressed to
- Not recorded
- Inspection dates
- Not recorded
- Response window
- Not verified in this snapshot. Consult the original letter.
- Record length
- 449 words · 3 recorded redactions
- Published status
- No published close-out
- Original letter
- View on FDA.gov (opens in a new tab)
- Dataset last checked
- Nov 11, 2026 · How this is built
A response window is not a calculated due date. Source excerpts are selected passages. Finding interpretations and categories are model-assisted. Verify the original letter before relying on a finding.