Doxycycline for Chlamydia

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1 pack of 8 100mg doxycycline oral capsules
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100 mg

14 capsule(s) - £18.00


Frequently asked questions

What is doxycycline used for?

Doxycycline is a broad-spectrum antibiotic, meaning it can be used to treat a range of infections such as (but not limited to):

  • sexually transmitted infections (STIs), such as chlamydia
  • skin conditions like acne
  • eye infections
  • chest, lung, or nasal infections
  • malaria

How effective is doxycycline for chlamydia?

Doxycycline is 95% effective in treating chlamydia when taken correctly.

When can I have unprotected sex after treatment?

We do not recommend unprotected sex, since protection like condoms can help avoid STIs and unwanted pregnancies. If you are planning to have unprotected sex, you should make sure both you and your partner are free of STIs, which means testing negative at least 3 months after the last time either of you slept with someone else.

We recommend that you wait until the day after finishing your treatment for chlamydia with doxycycline before you have sex. If your partner is still undergoing treatment, you should not have sex with them until they have also finished their treatment.

You should test for chlamydia every 3 to 6 months if you are sexually active and have multiple sexual partners, or if you change sexual partners. You should test more frequently than this if you are having unprotected sex with new partners.

Remember, it can take up to 2 weeks for chlamydia to show up on a sexual health test, so you need to make sure you wait the appropriate amount of time between sex and testing to obtain an accurate result.


What happens if you miss a dose of doxycycline for chlamydia?

If you miss a dose of doxycycline for chlamydia, aim to take your medication as soon as possible after the scheduled time. However, if it’s nearly time for your next dose, you can skip the original dose and just take the next tablet. After that, you can resume the normal dosage cycle, such as 1 dose every 12 hours for the remainder of your treatment window. It can be helpful to set an alarm or reminder each day if you’re worried about missing your doses.

Important: You must never take an extra dose to make up for a missed dose, and you should never take 2 doses at the same time. If you think you might have taken more doxycycline than recommended and are experiencing any side effects, get in touch with your GP or pharmacist.

Will 3 days of doxycycline cure chlamydia?

Clinical studies have found that a 3-day course of doxycycline can be as effective as a 7-day course of doxycycline for chlamydia.

However, it’s recommended in the UK that a 7-day course of doxycycline be prescribed for treating chlamydia to ensure that the infection clears fully. You must take the full prescribed course of treatment to clear the infection, as chlamydia is known to come back after treatment if the course is not finished.

Why am I still experiencing symptoms after taking doxycycline for chlamydia?

If you are still feeling symptoms of chlamydia after taking doxycycline, it may be a sign that the chlamydia bacteria in your body has developed resistance to the medication and you still have an infection. This can happen if you do not finish the full course of antibiotics and in rare cases, because it does not work for you.

It could also mean your symptoms are being caused by something other than chlamydia. If you are experiencing symptoms after finishing your doxycycline treatment for chlamydia you should speak with your doctor.

Can you drink alcohol whilst taking doxycycline for chlamydia?

No, drinking alcohol whilst taking doxycycline is not recommended. This is because drinking alcohol can reduce how effective the medication is.

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Medically reviewed by:
Dr Brenda Ikeji Medical Editor

Brenda studied medicine at St Georges University of London and has most recently worked in John Radcliffe Oxford University Hospitals, covering acute and general medicine.

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Last reviewed: 01 May 2025




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In stock. Prices from £18.00