Overview Codeine Plus Paracetamol Versus Placebo for PRK Post-operative Pain Status: Completed Trial end date: 2015-10-01 Target enrollment: Participant gender: Summary Compare the use of codeine/paracetamol against placebo for pain control after cornea photorefractive keratectomy (PRK). Phase: Phase 3 Details Lead Sponsor: University of Sao Paulo General HospitalTreatments: AcetaminophenCodeine