Genuine Efficascent. Dosage form: oil. Ingredients: CAMPHOR (SYNTHETIC) 40mg in 1mL, MENTHOL, UNSPECIFIED FORM 14.5mg in 1mL, METHYL SALICYLATE 183.5mg in 1mL. Labeler: International Pharmaceuticals Inc. NDC Code: 58929-100. Genuine Efficascent Oil. Active Ingredients Purpose. Camphor 4.0 percent. ...