Codeine is a painkiller. It's used to treat pain, for example after an operation or an injury. It's also used for long-standing pain when everyday painkillers, such as aspirin, ibuprofen and paracetamol, haven't worked. Codeine is a narcotic pain reliever (analgesic) used to treat mild to moderately severe pain. It is frequently combined with Tylenol or aspirin for more effective pain relief. Common side effects include itching, rash, stomach pain, constipation, shortness of breath, nausea, lightheadedness, and dizziness. Hello. I've not been around here for a fair while, but I decided to pop in and answer a few Codeine questions. In doing so I found some questions I cannot answer myself. Summary. There is no Diuretic effect reported by people who take Acetaminophen and codeine phosphate yet. This review analyzes which people have Diuretic effect with Acetaminophen and codeine phosphate. Codeine is an opiate pain medication that's sometimes referred to as a narcotic. Its active ingredient is found in many different medications that treat pain, cough, and diarrhea. Acetaminophen, known also as paracetamol, is the active ingredient in Tylenol and many other brands of painkillers. It is mainly used for pain and fever. A codeine overdose can be fatal, especially in a child or other person using the medicine without a prescription. Overdose can cause severe muscle weakness, cold and clammy skin, pinpoint pupils, very slow breathing, extreme drowsiness, or coma. The information reflected here is dependent upon the correct functioning of our algorithm. From time-to-time, our system might experience bugs or glitches that affect the accuracy or correct application of mathematical algorithms. NEW ZEALAND DATA SHEET. New Zealand Data Sheet Page. 1. of. 10. 1. PRODUCT NAME. Codeine Phosphate Tablets (PSM) 15 mg, 30 mg & 60 mg tablets. 2. QUALITATIVE AND QUANTITATIVE COMPOSITION Paracetamol, Codeine and Caffeine 500mg/8mg/30mg Soluble Tablets contain the active ingredients paracetamol, caffeine and codeine phosphate. Paracetamol is a well established analgesic, caffeine has a stimulating effect on the central nervous system and possesses a weak diuretic action. Codeine phosphate has moderate analgesic and weak cough-suppressant effects. No new non-clinical or clinical.