Active substance
Serotonin
2 products from 2 companies contain this in United States.
2 without prescriptionLiquid
Available without a prescription
Liquid Serotonin3X/mLWithout prescription Pain and Stress Center Products · SerotoninSerotonin 15439X/29.5mLWithout prescription Professional Complementary Health Formulas · Serotonin
Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.