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Medication guide

Doxycycline (Modified-Release, Low-Dose)

An anti-inflammatory treatment for adult rosacea bumps, not an antibiotic regimen for infection.

Check the name, strength and form on your own prescription or package.

Brand
Apprilon
Form
40 mg modified-release capsule
Guidance checked
2026-09-08

About this medication

  • This medicine is a once-daily capsule that treats the red bumps and pimples of rosacea. It uses a very low dose of the antibiotic doxycycline that works by calming inflammation rather than fighting infection.

An anti-inflammatory treatment for adult rosacea bumps, not an antibiotic regimen for infection.

How to use it

  • Take one capsule once a day in the morning, on an empty stomach -- at least 1 hour before or 2 hours after eating.
  • Swallow it with a full glass of water, and do not lie down right after taking it.
  • Do not take antacids, or calcium, iron, or magnesium supplements, within 2 to 3 hours of this medicine -- they reduce how well it works.

If you miss a dose

  • Skip the missed dose and take your next dose at the regular time. Do not take two doses at once.

Take one capsule each morning on an empty stomach, with plenty of water. Do not lie down immediately. Evidence beyond 16 weeks is limited.

Pregnancy and breastfeeding

  • Do not take this medicine if you are pregnant, might become pregnant, or are breastfeeding.

Do not use during pregnancy or breastfeeding. Not recommended for children.

Before you use it

  • Tell your healthcare professional if you are pregnant, breastfeeding, or could become pregnant.
  • Tell them if you have myasthenia gravis, liver problems, or a history of stomach surgery (such as gastric bypass).
  • Tell them about all other medicines you take, especially antacids, iron or calcium supplements, blood thinners, diabetes medicines, or isotretinoin.

Important warnings

  • This medicine can make your skin much more sensitive to sunburn -- use sunscreen and limit sun and tanning-bed exposure.
  • Severe diarrhea during or after treatment could be a sign of a serious bowel infection -- contact your doctor if this happens, even after you've finished the capsules.
  • Rarely, this medicine can cause increased pressure in the head, with headache and blurred vision -- contact your doctor right away if you notice vision changes.
  • This medicine must not be used during pregnancy (it can permanently discolour a baby's teeth and affect bone growth) or while breastfeeding.
  • Do not use this medicine in children under 8 years old.

Avoid tetracycline allergy, myasthenia gravis and inappropriate substitution with 100 mg doxycycline.

Possible side effects

  • Diarrhea, upset stomach, or stomach pain
  • Headache
  • Nausea
  • Vaginal yeast infection or oral thrush

Diarrhoea, abdominal discomfort and headache; sun sensitivity can occur.

When to get help

When to get emergency help

  • Severe or bloody diarrhea
  • Sudden vision changes or a severe headache
  • Signs of a serious allergic reaction: swelling of the face or throat, difficulty breathing, widespread rash

When to contact a healthcare professional

  • If diarrhea is severe or does not go away.
  • If you notice joint pain, fever, or a new rash.
  • If you develop unusual bruising, yellowing of the skin or eyes, or dark urine.

Seek care for severe diarrhoea, painful swallowing, or headache with visual changes.

Other medicines and products

  • Avoid taking this medicine with milk, dairy products, or calcium-fortified juice -- wait at least 2 to 3 hours.
  • Avoid combining with isotretinoin or other oral acne/rosacea retinoids.
  • Tell the Care365 care team if you take blood thinners, diabetes medicines, or hormonal birth control, since this medicine can affect how well they work.

Separate mineral supplements and antacids; review retinoids, anticoagulants and other medicines.

Missed doses, storage and accidental exposure

  • Store at room temperature (15°C to 25°C) in the original package, away from light.
  • Keep out of the reach of children.

Follow your own product’s missed-dose instructions. If you are unsure, ask the Care365 clinical team before taking an extra dose. Contraceptives, injections and modified-release medicines may need a specific plan.

Keep the original packaging and follow its storage, expiry and disposal instructions. Keep medicines away from children and pets. Ask about refrigeration, after-opening limits and safe sharps disposal when relevant.

For suspected overdose or accidental swallowing, contact poison control or urgent medical care promptly. Call emergency services for breathing difficulty, collapse or a seizure.

Key points to remember

  • This is a low, anti-inflammatory dose of doxycycline, not a full antibiotic dose -- do not take extra thinking it will work faster or better.
  • It treats bumps and pimples, not facial redness -- your doctor may add a different treatment if redness is also a concern.
  • Protect your skin from the sun every day while taking this medicine.

These practical points come from the Pharmasist patient handout for the same product monograph cited by this guide.

References and product information

Sources checked .

Sources checked 2026-09-08. Safety sections are highlights; consult the full product information for complete warnings and instructions.

Check the Canadian Drug Product Database by product name or DIN for current product information.

This is a plain-language guide, not the complete monograph. Match the name, strength and form on your package before using product-specific directions.

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