Codeine is an opioid medicine used to relieve certain types of pain and is generally prescribed when other painkillers have not provided enough relief. It can cause side effects such as constipation, nausea, sleepiness and, more seriously, breathing difficulties. People searching can you get coden tablets without prescription should understand that codeine itself is prescription-only in the UK, although some lower-strength combination medicines containing codeine may be available from pharmacies under specific conditions. Codeine can also lead to dependence when used for longer periods. Anyone considering codeine should speak with a doctor or pharmacist about whether it is appropriate and how it should be used safely.