Grandma's antibiotic tincture is an herbal remedy made with usnea lichen and has long been used in traditional medicine for its purported antimicrobial properties. The primary active compound, usnic acid, is known to have antibacterial and antifungal effects.
 
However, significant safety concerns, including potential liver damage, are associated with taking usnea orally. 
 
*Rock Pillar Grounds does not offer medical advice, and this product is not a substitute for professional healthcare. Please consult your physician before using herbal products, especially if pregnant, nursing, or taking medications.*