Hydrogen peroxide

• 3%: Over-the-counter topical antiseptic
• 6–10%: Whitening/bleaching agents (professional use)
• 30–35%: Food grade or industrial – requires strict dilution and medical supervision

• Use only externally or in oral rinses (diluted)
• Avoid contact with eyes, deep wounds, or mucosal linings unless instructed by a professional
• Foaming is normal — it indicates breakdown and release of oxygen
• Store in dark container away from heat/light to preserve stability

• Use only externally or in oral rinses (diluted)
• Avoid contact with eyes, deep wounds, or mucosal linings unless instructed by a professional

• Hydrogen peroxide releases reactive oxygen species (ROS) upon contact with tissue, aiding in:
  • Mechanical debridement
  • Antibacterial activity (kills anaerobes)
  • Oxygenation of tissues (temporarily)

• Topical:
  • Skin irritation, stinging
  • Delayed healing with prolonged use
• Oral rinse:
  • Mucosal irritation, burning, altered taste
• Accidental ingestion or inhalation:
  • Nausea, vomiting, respiratory irritation

Large-volume ingestion: gas embolism, gastric perforation (emergency)

• Hypersensitivity to peroxide
• Use in deep puncture wounds, body cavities, or large open wounds
• Ocular exposure (can cause serious damage)

• None significant when used topically or locally
• Not for systemic use — do not combine with oxidizing agents or flammable products