> ## Content Index
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# Latest FDA Warning Letters
- URL: https://www.fdaweb.com/latest-fda-warning-letters-34/
- Published: 2020-08-18T12:00:00.000Z
- Updated: 2026-09-14T16:25:18.000Z
- Author: David McFarland
- Tags: Drugs, #legacy-id-D5147455

FDA has posted its latest batch of Warning Letters. They can be accessed by clicking on the link following each letter.

**AkivaMed**, U.S. (7/23): FDA recently reviewed the company’s Web site (www.akivamed.com) and determined that its “Covid-19 Antibody Rapid Test Kit” marketed to consumers for at-home use is an adulterated and misbranded product. FDA says it has not approved, cleared, or authorized any Covid-19 serology test for at-home testing. To view the letter, click [here](https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/akivamed-inc-609211-07232020?ref=fdaweb.com).

**Oxford Medical Instruments USA**, Carlsbad, CA (8/11): An FDA review of the company’s Web site determined that its salt inhaler products for treating Covid-19 are misbranded unapproved new drugs. The agency told the company to immediately cease making any claims that its products can prevent, treat, or cure human diseases since there is no reliable scientific evidence, including well-controlled human studies, to support any such claims. To view the letter, click [here](https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/oxford-medical-instruments-usa-inc-609104-08112020?ref=fdaweb.com).

**SilveryGuy**, Singapore (8/14): FDA says a Web site and Facebook page operated by SilveryGuy is selling unapproved and misbranded colloidal silver representing or implying that the product can mitigate, prevent, treat, diagnose, or cure Covid-19 in people. The agency cites several of the Web site and social media claims that establish the intended use for the product and misleadingly represent it as safe and effective for treating or preventing Covid-19\. To view the letter, click [here](https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/silveryguy-609843-08142020?ref=fdaweb.com).