Hyun Kwang Dan
Senior Managing Director
Sinsin Pharmaceutical Co., Ltd.
9 Sojeongsandandong-Ro
Sojeong-myeon
Sejong
30002
South KoreaFEI 3002277609Issued Nov 12, 2025Center for Drug Evaluation and Research (CDER)
Source: FDA, published letter. FDA published this warning letter; View Letter opens FDA's copy. To check it, open FDA's record for this establishment, listed under FEI 3002277609.
Violations1
Issue DateNov 12, 2025
Product TypeOther
StatusOpen
Letter Details
Firm
Sinsin Pharmaceutical Co., Ltd.
Location
Hyun Kwang Dan
Senior Managing Director
Sinsin Pharmaceutical Co., Ltd.
9 Sojeongsandandong-Ro
Sojeong-myeon
Sejong
30002
South Korea
FEI Number
3002277609
Country
South Korea
Issue Date
November 12, 2025
Issuing Office
Center for Drug Evaluation and Research (CDER)
Product Type
Other
Status
Open
Summary
Sinsin Pharmaceutical Co., Ltd. was cited for distributing two unapproved OTC pain relief drug products—SINSINPAS AREX INSTANT PAIN RELIEF and SINSINPAS Pain Relieving Liquid MULPAS—through their website and Amazon storefront without FDA approval, violating sections 505(a) and 301(d) of the Federal Food, Drug, and Cosmetic Act. The products were also found to be misbranded under section 502(ee) of the FD&C Act, as they made drug claims without the required regulatory authorization. The company promoted these products through their website, social media channels on Facebook and Instagram, and directed consumers to purchase them without prescription, despite lacking the necessary new drug applications.
Sinsin Pharmaceutical Co., Ltd. FDA Warning Letter, November 12, 2025