Penix-P 37.5mg/325mg Tablet is a combination of two pain killer medicines that is used to relieve moderate to severe pain. Penix-P 37.5mg/325mg Tablet should be taken in the dose and duration advised by your doctor. It may be taken with or without food. In case you experience stomach upset then take the medicine with food. It is important not to miss doses and to keep taking them until your doctor tells you it is safe to stop. Do not stop using this medicine without asking your doctor. This medicine may cause side effects like vomiting, nausea, dryness in the mouth, dizziness, and constipation in some patients. These are usually mild and disappear after a short time. Inform your doctor immediately if any rash or allergic reaction is observed while taking this medicine. If you are pregnant, thinking about becoming pregnant, or breastfeeding, ask your doctor before taking this medicine.