Peptac is an oral ulcer medication. What does Peptac treat? Peptac was developed by Janssen Pharmaceuticals and was approved by the US FDA in 1981. Peptac is marketed as an analgesic, an anti-inflammatory, a decongestant, a stomach relief and a treatment for allergies. Peptac is made up of amino acids and isomers and contains phenol.Peptac is taken as a pill or tablet, to be taken just before...