Active substance
Piperonyl Butoxide and Pyrethrum Extract
2 products from 2 companies contain this in United States.
2 without prescriptionShampoo
Available without a prescription
Herklin40 mg/mL + .033 mg/mLWithout prescription MarcusUSA · Piperonyl Butoxide and Pyrethrum ExtractRid Lice Killing40 mg/mL + .033 mg/mLWithout prescription Oystershell Consumer Health Inc · Piperonyl Butoxide and Pyrethrum Extract
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.