Protoberberine alkaloids and their derivatives are a class of natural products isolated from various plants, particularly from Berberidaceae (barberry family) and Ranunculaceae (buttercup family). These compounds have garnered significant attention due to their diverse biological activities. They exhibit potent antimicrobial properties against both Gram-positive and Gram-negative bacteria, as well as fungi. Additionally, protoberberine alkaloids possess anti-inflammatory, antioxidant, and neuroprotective effects, making them promising candidates for the development of therapeutic agents in various fields. Structurally, these alkaloids often contain a quinoline or isoquinoline core with hydroxylation patterns that contribute to their pharmacological properties. Derivatives of protoberberine alkaloids can include modifications such as methylation, acetylation, and cyclization, which can enhance their stability, solubility, or bioavailability. Due to their complex structures and multifaceted biological activities, these compounds are extensively studied in academia and industry for potential applications in medicine, natural products chemistry, and biotechnology. In summary, protoberberine alkaloids and their derivatives represent a rich source of bioactive molecules with promising therapeutic potentials across multiple medical disciplines.