Westwood Laboratories LLC, a drug manufacturer in Azusa, California, was cited for significant Current Good Manufacturing Practice (CGMP) violations in its production of over-the-counter pharmaceutical products, rendering them adulterated. The company failed to adequately investigate product complaints and quality failures, such as a batch of Advanced Protection SPF 30 that separated, and did not properly review manufacturing records or evaluate processing parameters before taking corrective action. Notably, the firm reprocessed a defective lot, assigned it a new expiration date, and released it without adequate investigation—demonstrating systemic failures in batch investigation and quality control procedures required under 21 CFR 211.192.