Used primarily as an antiseptic and astringent in topical pharmaceutical formulations, especially for treating minor skin irritations, wounds, and mucous membrane inflammations. Its bismuth component contributes to antimicrobial activity, while the complex structure supports tissue healing and reduces irritation. Commonly found in over-the-counter products for hemorrhoids, burns, and oral ulcers due to its protective and soothing effects. Also utilized in some anti-diarrheal medications for its mild antimicrobial and protective action on the gastrointestinal lining.