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Doxycycline

Doxycycline is a prescription antibiotic that effectively treats sexually transmitted infections (STIs) such as chlamydia, non-specific urethritis, and ureaplasma urealyticum. It can also be used in combination with other medications to treat mycoplasma genitalium.

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Dose guides: 100mg

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£12.49100mg · 14 pack

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Medically reviewed by Muhammad Abdul Jalil, Superintendent Pharmacist · GPhC Reg No: 2236161

Last reviewed

Doxycycline: Effective Treatment for STIs and Infections

What is Doxycycline?

Doxycycline is a prescription antibiotic that effectively treats sexually transmitted infections (STIs) such as chlamydia, non-specific urethritis, and ureaplasma urealyticum. It can also be used in combination with other medications to treat mycoplasma genitalium.

Additionally, Doxycycline prevents malaria in individuals travelling to high-risk areas. It is available in 100mg capsules and works by stopping the spread of infection, enabling the body to recover.

How Does Doxycycline Work?

Doxycycline belongs to the tetracycline class of antibiotics. It works by inhibiting bacterial growth and preventing bacteria from producing the proteins needed to multiply. This helps your immune system eliminate the infection.

By disrupting bacterial cell function, Doxycycline effectively treats infections and prevents reinfection when taken as prescribed.

How to Take Doxycycline for STIs

Always follow your healthcare professional’s instructions when taking Doxycycline. Below are general guidelines:

Dosage Instructions for STIs (e.g., Chlamydia):

  1. Start with a 200mg dose (2 capsules) on the first day.
  2. Continue with a 100mg dose (1 capsule) daily for the remaining days.
  3. Take the capsules at the same time each day, ideally after a meal, to reduce stomach irritation.
  4. Avoid sexual activity during treatment and for 7 days after completion.

For Mycoplasma Genitalium Treatment:

Doxycycline is combined with Azithromycin for a 10-day treatment course. Ensure to follow your healthcare professional’s advice for this combination therapy.

Important Notes:

  • Finish the full course, even if symptoms improve.
  • Store capsules in a cool, dry place away from children.

What Happens If You Miss a Dose?

If you miss a dose:

  • Take it as soon as you remember unless it is close to your next scheduled dose.
  • Do not take two capsules at the same time to make up for the missed dose.

Possible Side Effects of Doxycycline

Doxycycline is generally well-tolerated, but some individuals may experience side effects.

Common Side Effects:

  • Skin sensitivity to sunlight
  • Nausea or vomiting
  • Diarrhoea
  • Headaches
  • Skin rash or irritation

Severe Side Effects:

  • Allergic reactions (e.g., swelling of the face, difficulty breathing)
  • Persistent symptoms such as extreme tiredness or severe skin reactions

If you experience severe or long-lasting side effects, consult your healthcare professional immediately.

Precautions and Interactions

Before Taking Doxycycline:

  • Inform your healthcare professional if you are pregnant, breastfeeding, or planning to conceive.
  • Avoid alcohol during treatment, as it may increase the risk of side effects.
  • Use SPF 50 sunscreen and protective clothing to avoid sunburn, as Doxycycline can make your skin more sensitive to sunlight.

Medicine Interactions:

Avoid taking Doxycycline with:

  • Retinoids
  • Antacids or supplements containing calcium, magnesium, or iron (these reduce its effectiveness)
  • Blood thinners (e.g., warfarin)
  • Other antibiotics without consulting your healthcare professional

Can You Buy Doxycycline Online?

You can purchase Doxycycline capsules online from Medihealth Direct after completing a confidential consultation. A UK-registered healthcare professional will review your responses to ensure the medication is suitable for you.

Once approved, your order will be discreetly packaged and delivered the next day at no additional cost.

Doxycycline FAQs

Is Doxycycline suitable for treating gonorrhoea?

No, Doxycycline is not the sole treatment for gonorrhoea. You may require an antibiotic injection and further testing at a sexual health clinic.

Can I drink alcohol while taking Doxycycline?

No, alcohol may interfere with the effectiveness of Doxycycline and increase the risk of side effects.

How long does Doxycycline take to work?

Doxycycline starts working within a few days, but it may take up to 7 days to see significant improvement. Always complete the prescribed course.

Can Doxycycline be used for urinary tract infections (UTIs)?

Yes, Doxycycline can treat UTIs, but other antibiotics like Trimethoprim or Nitrofurantoin are more commonly prescribed.

What should I eat with Doxycycline to avoid stomach upset?

Pair Doxycycline with meals that include whole grains, yoghurt, or other probiotic-rich foods to promote gut health. Avoid dairy products at the time of taking your dose.

Can Doxycycline cause drowsiness?

Fatigue is a rare side effect. If you feel extremely tired or unwell, contact your healthcare provider.

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Pack size comparison
100mg
  • 14 pack£12.49
  • 28 pack£12.99
  • 48 pack£19.99
  • 56 pack£23.99
  • 64 pack£24.99
  • 72 pack£27.99
  • 88 pack£32.99
  • 96 pack£34.99
  • 112 pack£53.99
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