Dihydrocodeine Side Effects — Full UK Guide
Like every opioid analgesic, dihydrocodeine carries a predictable set of side effects. Most are mild and settle within a few days as your body adapts.
Very common (more than 1 in 10)
- Constipation — start a stool softener (lactulose, Movicol) on day one if you’ll be taking it more than 2–3 days
- Drowsiness — don’t drive or operate machinery until you know how it affects you
- Nausea — usually settles within 3–5 days; take with food
- Dry mouth
Common (up to 1 in 10)
- Headache
- Dizziness, especially on standing
- Mild itching
- Sweating
- Mood change (mild euphoria or low mood)
Less common
- Difficulty passing urine
- Visual disturbance
- Slow heart rate
Rare but serious — seek urgent help
- Difficulty breathing or very slow breathing
- Severe confusion or hallucinations
- Allergic reaction (rash, swelling of face/lips, wheezing)
- Severe abdominal pain
Call 999 or go to A&E immediately if any of these occur.
Side effects of 30mg specifically
See our dedicated 30mg side-effects breakdown.
What about long-term use?
Prolonged daily use causes physical dependence — your body adapts and stopping suddenly produces withdrawal. Read our withdrawal and tapering guide before stopping any long course.
Reducing side effects
- Take with food
- Stay well hydrated
- Start laxatives early
- Use the lowest effective dose for the shortest time
Order dihydrocodeine
Need a fresh supply? Order dihydrocodeine online from Dihydrocodeine UK Store with discreet next-day delivery.