Rosacea erythema formula guide
How to use the prescribed metronidazole, niacinamide, azelaic acid and allantoin compounded cream safely.
Rosacea erythema formula guide
How to use the prescribed metronidazole, niacinamide, azelaic acid and allantoin compounded cream safely.
- READ TIME
- 2 min read
- PATHWAY
- Compounded redness formula
- DOSE RANGE
- Once daily, evening → Once daily
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How to use
- What it is and how it works
This validated compounded cream contains metronidazole 0.75%, niacinamide 4%, micronised azelaic acid 10% and allantoin 0.5%. It is prescribed for a rosacea pattern dominated by persistent facial redness.
- Apply it as prescribed
Apply a thin layer once daily to clean, dry skin over the prescribed area. Avoid the eyes, mouth, mucosa and broken skin, and wash your hands afterwards. Use only the labelled 30 g preparation supplied by the pharmacy.
- Skin care and interactions
Tell the prescriber about warfarin, coumarins or other anticoagulants and any history of blood disorders. Do not add another metronidazole or facial medicine without review. Use gentle skin care, daily sunscreen and avoid known rosacea triggers.
First 8 weeks. Photograph your face in the same daylight at the start and at 8 weeks; redness is hard to judge from memory. Keep a trigger diary and use SPF 50+ every morning; sun is the most common driver of persistent redness. Stinging or flaking in the first 2 weeks is expected; keep the cream away from the eyes to avoid watering.
Ongoing. Stop and ask for review for a spreading rash, swelling, wheeze or worse asthma control. If redness comes and goes within minutes (flushing), tell your doctor; that pattern is vascular and needs a different approach. Store the compounded cream as the pharmacy label says and discard it after the stated shelf life.
Treatment pathway
- Once daily, eveningWeeks 1-2
- Once dailyWeeks 3-8
- Once dailyWeeks 9-12
Reviews happen through your account chat; send photos in the same light each time.
See the full decision pathway
Your redness pathway
Weeks 1-12
Redness formula once daily
Thin layer in the evening over the red areas, with a bland moisturiser, trigger control and SPF 50+.
At 8 weeks, is background redness visibly lighter on like-for-like photos?
Yes
Complete the course
Finish 3 months; your doctor then decides on maintenance with azelaic acid or metronidazole.
No
Doctor review
Your doctor reassesses whether the redness is vascular, and may discuss a vasoconstrictor product or in-person vascular laser.
Weeks 1-12Understanding your redness
Inflammatory
Keep calming inflammation
Maintenance with azelaic acid or metronidazole, reviewed every 3 to 6 months.
Vascular
Different tools
Trigger avoidance, a vasoconstrictor product for temporary reduction, or vascular laser in person.
Reviews happen through your account chat; send photos in the same light each time.
Dose schedule
| Dose | When | Note |
|---|---|---|
| Once daily, evening | Weeks 1-2 | Mild stinging or flaking from the azelaic acid component; use a bland moisturiser. |
| Once daily | Weeks 3-8 | Inflammation settles; redness fades gradually. Photo review at 8 weeks. |
| Once daily | Weeks 9-12 | Complete the 3-month course; the doctor decides on maintenance or a change. |
How it compares
| Rosacea treatments compared | How it works | Best suited for | How often | Judged at | Product type |
|---|---|---|---|---|---|
| Azelaic acid 15% | Reduces inflammation and follicular signals behind papules and pustules | Papulopustular rosacea; first-line; sensitive skin | Twice daily | 12 weeks | EU-authorised medicine |
| Compounded redness formula | Metronidazole and azelaic acid calm inflammation; niacinamide and allantoin repair the barrier | Persistent background redness with a mild inflammatory component | Once daily | 12 weeks | Pharmacy-compounded to prescription |
| Compounded spot formula | Ivermectin acts on Demodex and inflammation; metronidazole adds anti-inflammatory effect | Moderate papules and pustules, or after azelaic acid alone is not enough | Once daily | 12 weeks | Pharmacy-compounded to prescription |
Evidence certainty from van Zuuren 2019 (BJD): high for azelaic acid and ivermectin, moderate for metronidazole, for papules and pustules. Compounded combinations have not been trialled as products.
Side effects
Local irritation
Mild redness, dryness, stinging or peeling can occur, especially at the start. Use a gentle moisturiser and follow the prescribed adjustment plan. Stop and seek advice if the reaction is marked or persistent.
Allergy or unusual bleeding
Stop and seek advice for a spreading rash, marked swelling or severe burning. If you take an anticoagulant, report unexpected bruising or bleeding promptly.
Do not use if
- You are allergic to metronidazole, azelaic acid, niacinamide, allantoin or the final vehicle
- A blood disorder or anticoagulant treatment has not been reviewed
- You are pregnant, trying to conceive or breastfeeding and the formula has not been individually reviewed
When to contact your doctor
- Facial swelling, breathing difficulty, widespread blistering, eye pain, light sensitivity or altered vision: seek urgent medical care
- Unexpected bruising or bleeding, particularly while taking an anticoagulant
- There is no satisfactory response at the 6–12-week review or the redness is worsening
Storage
Keep the compounded preparation in its labelled container, out of children's reach. Follow the pharmacy's storage conditions and beyond-use date; these depend on the final vehicle. Do not transfer it to another container.
What to expect
The formula is reviewed after 6–12 weeks and is limited to the prescribed 3-month course. Redness can fluctuate with triggers, so use dated photographs in similar lighting rather than day-to-day impressions.
Sources
Questions while you're on treatment?
Message your doctor in your private chat about side effects, doses or anything that worries you. Replies in under 2 hours on average.
- Follow up on your skin treatment in the chat
- Download your e-prescription
- Renewals reviewed by your doctor
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