Doxycycline

  • Treats Chlamydia
  • 1 Week course
  • Treats men and women
From As low as £16.99
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What is Doxycycline?

Doxycycline is an antibiotic used to treat a wide variety of bacterial infections. It is part of the tetracycline antibiotics group.

The tablet comes available in two potencies, Doxycycline 100mg or 50mg, and the patient will be prescribed the appropriate dosage by their doctor.

What is Doxycycline used for?

This antibiotic provides effective treatment for a number a bacterial infections, such as malaria and rosacea.

It is recommended as the primary treatment for chlamydia due to the decreased chance of bacterial resistance. This is usually done by taking 2 capsules daily (14 capsules in total) over a period of 7 days. Doxycycline is also used to treat gonorrhoea and other sexually-transmitted infections.

It can also be used to treat various other types of infections, including respiratory infections, ear infections, skin infections, psittacosis, diarrhoea, leptospirosis, brucellosis, tick fever and Q fever. It can even be used to treat acne.

This medicine will not help to treat the effects or symptoms of a common cold or flu.

Who should not use Doxycycline

This antibiotic should only be taken by adults and children who are over 12 years of age.

It is not normally recommended for women who are pregnant or breastfeeding to use Doxycycline. If you are trying to get pregnant, you should also inform your doctor before taking it.

Inform your doctor if you have any of the following, as Doxycycline may not be suitable for you:

  • Kidney problems
  • Liver problems
  • You have had an allergic reaction to Doxycycline or other medicines in the past
  • You are likely to be exposed to strong sunlight/ultraviolet light
  • Myasthenia gravis
  • Inflamed food pipe (oesophagitis)
  • Porphyria
  • Systemic lupus erythematosus

Possible side effects

Around 1 in 10 people will experience the common adverse effects. If you do experience any of these, do not stop taking the medication, but consult your doctor or pharmacist if these side effects persist or bother you:

  • Nausea/vomiting
  • Headaches
  • Sensitivity to sunlight

For more serious reactions, refer to our Side Effects tab. Always read the patient information leaflet, which will accompany your medication.

Doxycycline Dosage

Always read the instructions and advice within the information leaflet that will accompany your medication.

If you forget a dose, take it as soon as you remember, unless it is almost time for your next dose. Do not take two doses at the same time and do not take an extra dose to make up for missing one.

You should always ensure you complete the prescribed course to make certain the bacteria has been fought properly. 

Taking Doxycycline for chlamydia

Take one capsule twice a day for 7 days (14 capsules in total). Take Doxycycline either with or after a meal, with a full glass of water.

If you are taking this antibiotic to treat chlamydia, do not have sex for seven days after the completion of treatment. Take another chlamydia test after 14 days.

Treating acne with Doxycycline

Doxycycline should be taken once a day for 6 or 12 weeks, to cure acne or blisters on the skin.

Treating malaria with Doxycycline

Take two 100mg Doxycycline tablets for 7 days (14 capsules in total).

Typhus can also be prevented by having only one tablet.

Taking Doxycycline for rosacea

50mg or 100mg depending on your individual condition is recommended. Further courses of the antibiotic may be required as inflammatory rosacea is a chronic condition.

Treating diarrhoea with Doxycycline

Patients are advised to have 200mg immediately. The dose must then be reduced to 100mg for a maximum of 3 weeks.

Why choose Doxycycline?


It is a powerful antibiotic drug which is able to kill a wide range of bacteria that can often be very difficult to treat with other antibiotics. It is famous for its ability to treat a large number of conditions in a relatively short period of time. It can also be used to prevent malaria. It is available in a two doses to aid a large number of conditions, Doxycycline 100mg and 50mg are available on our website. Doxycycline 100mg are the strongest capsules available in this form of medication.

Can I buy it online?


Yes, you can buy Doxycycline online. With a prescription, it is available to be purchased at a UK registered online pharmacy. With a UK prescription it can be bought at Medicine Direct.

How effective is it?


This antibiotic is very effective at treating bacterial infections relatively quickly. The medicine is able to reach bacteria and parasites which are deep inside the body, meaning it is one of the most effective antibiotics on the market.

What dose should I choose?


Whether Doxycycline 100mg or 50mg is more beneficial for you will be determined by your health professional, who will diagnose the dosage depending on your illness. It is important you do not deviate from their recommendation.

How should I take Doxycycline?


Try to space your doses throughout the day, evenly. Swallow the capsule whole and have it with a full glass of water. You do not need to have this medicine with food, but you are less likely to feel sick if you take it with or after a meal. Swallow it in an upright position to ensure the medicine does not irritate your stomach or food pipe. If you accidentally consume an extra dose, it is not likely to do you any harm, but do contact your doctor or pharmacy if you are worried or you consume more than one additional dose.

What are the advantages of taking it?


This is a fast-acting medication, which can also have preventative measures as well as the ability to treat infections.

How does Doxycycline work?


Doxycycline works to treat infection by preventing the growth and spread of bacteria in the body. It is able to reach bacteria deep in the body, meaning it is able to effectively remove parasites which create a number of conditions.

What does Doxycycline contain?


100mg Doxycycline (as hyclate) is the active ingredient.Each capsule also contains: gelatin, magnesium stearate, shellac glaze, sodium lauryl sulphate, starch, E104, E127, E131, E171, E172 & propylene glycol.

Doxycycline Side Effects

Serious adverse effects are rare and happen in less than 1 in 1,000 people, but you should still call your doctor immediately if you experience any of the following:

  • Diarrhoea that contains mucus or blood
  • Dark urine or pale stools
  • Yellow skin, yellowing in the whites of the eyes (could be a liver problem)
  • Joint or muscle pain
  • Unexplained bruising or bleeding, sore throat, high temperature or feeling unwell (possible signs of blood problems)
  • Fingernails coming away from the base
  • Ringing of the ears
  • Swollen mouth, lips or tongue
  • Severe stomach pains, with or without vomiting or diarrhoea
  • Difficulty in swallowing or pain when swallowing
  • Acid reflux, smaller appetite or chest pains which worsen when you eat
  • Severe headaches, problems with your vision

It is quite common for people to have an allergic reaction to Doxycycline and, in rare cases, this can lead to anaphylaxis.

If you experience any of the below, you should either go to A&E or call 999:

  • Wheezing
  • A skin rash which may blister, peel, swell, redden or itch
  • Difficulty in breathing or talking
  • Tightness in the chest or throat
  • Swelling of the mouth, tongue, throat, face or lips

Please refer to the patient information leaflet which will come with your medicine for the full list of possible risks.

Doxycycline Warnings and Drug Interactions

If you are taking any other medicines, you should also tell your doctor as certain medications do not mix well with Doxycycline.

Be sure to inform your doctor if you are taking any of these medicines before you start to use Doxycycline:

  • Iron supplements
  • Other antibiotics
  • Stomach ulcer medicines that contain bismuth
  • Indigestion remedies (antacids)
  • Acne medicines containing vitamin A
  • Warfarin (blood thinners)
  • Supplements containing bismuth, calcium, magnesium or zinc, aluminium
  • Epilepsy medicines, such as phenytoin or carbamazepine
  • Cyclosporine

There are no known issues with combining this medicine with herbal remedies and supplements, but you should still inform your doctor or pharmacy if you are taking any.

If you require a typhoid vaccination while using this antibiotic, you will be given it via injection by your doctor as the oral vaccine may not work properly.

Pregnancy and breastfeeding 

Doxycycline is not recommended during pregnancy or breastfeeding. Always talk to your docotr if you are pregnant, breastfeeding or planning to conceive before taking any medication. 

Doxycycline Ingredients

The active ingredient is Doxycycline 100mg (as hyclate).

Each Doxycycline tablet contains: gelatin, magnesium stearate, shellac glaze, sodium lauryl sulphate, starch, E104, E127, E131, E171, E172 & propylene glycol.

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This content has been written by our Superintendent Pharmacist Hussain Abdeh and has been medically reviewed by our Pharmacist Sonia Khan

Hussain Abdeh Superintendent Pharmacist at Medicine Direct

Hussain Abdeh
MPharm: 2211840

Pharmacist Independent Prescriber

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