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Doxycycline - Chlamydia Treatment
In Stock
Thursday, 02 Jul 2026
Medication features
Doxycycline is a proven and highly effective treatment for chlamydia. You'll start feeling better in a few days, but complete the full course of medicine.
- Over 99% effective at treating chlamydia infection.
- Starts working quickly
- Typically clears up infections in about 7 days
- Take 1 capsule, twice a day, for 7 days
Overview
NOTE: After selecting this product, you will need to complete a short assessment, so we can make sure this medication is suitable for you.
Buy Doxycycline Online for chlamydia
You can order Doxycycline 100mg online from our UK registered pharmacy. Fill out an assessment form to check if the treatment is right for you.
After placing your order, our pharmacy team will prepare and send your medication to the address you've provided.
- Proven and effective treatment for chlamydia.
- For most infections, you'll start feeling better in a few days, but complete the full course of medicine.
- Doxycycline works more slowly for rosacea. A doctor can assess progress after about 4 weeks.
- Common side effects include headaches, nausea, and increased sun sensitivity.
- Avoid alcohol while taking Doxycycline for it to work effectively.
- Rarely, Doxycycline 100mg may cause thrush. Consult your doctor or pharmacist if it happens.
Doxycycline is an antibiotic, effective treatment for sexually transmitted infections (STIs) like chlamydia, gonorrhea and syphilis.
It also used to treat other bacterial infections (chest and dental infections) in humans, like respiratory and urinary tract infections, skin and eye infections. It stops bacteria from growing in the body.
You take it by mouth, with or without food, as directed by your doctor. It's important to finish the full course, even if you feel better. Discuss any side effects with your doctor.
Besides infections, Doxycycline is prescribed for conditions like treat acne and specific types of malaria prevention. It comes in different forms (tablets, capsules, oral suspensions) and is usually taken orally, with or without food, as directed by a healthcare provider.
Note: Doxycycline is available by prescription in various forms, including capsules, tablets, and dispersible tablets that dissolve in water.
What is Doxycycline 100mg used for?
Doxycycline is a versatile antibiotic used to treat a wide range of bacterial infections, as well as for some non-bacterial conditions.
Treating bacterial infections:
- Respiratory infections: This includes pneumonia, bronchitis, and sinus infections.
- Urinary tract infections (UTIs): Doxycycline can treat both simple and complicated UTIs.
- Skin infections: It can treat acne, rosacea, and other bacterial skin infections.
- Sexually transmitted infections (STIs): Doxycycline is used to treat gonorrhea, chlamydia and syphilis.
- Other infections: It can also be used to treat infections of the eyes, ears, and teeth, as well as Lyme disease and other tick-borne illnesses.
Preventing infections:
Malaria: Doxycycline can be used to prevent malaria in people traveling to high-risk areas.
Anthrax: It can be used as part of post-exposure prophylaxis for anthrax.Non-bacterial uses:
Acne: Doxycycline has anti-inflammatory effects that can help control acne breakouts.
Rosacea: It can help reduce redness and inflammation associated with rosacea.
How does Doxycycline work?
When used correctly, Doxycycline is an effective and proven treatment for bacterial infections like Chlamydia in Over 99% of cases. Doxycycline is a type of antibiotic called tetracycline.
It works by blocking the bacteria causing your infection from making essential proteins. Without these proteins, the bacteria can't survive or multiply, By preventing this process, Doxycycline effectively kills the bacteria responsible for your infection.
How long does it take for chlamydia?
It typically takes around 7 days for chlamydia to completely clear after finishing the full Doxycycline treatment course. You can resume sexual activity the day after completing treatment, unless your sexual partner is still in treatment.
It's advisable to undergo chlamydia retesting every 3 to 6 months if you switch sexual partners, as this may increase the risk of reinfection.
How effective is Doxycycline?
In clinical studies, Doxycycline has demonstrated remarkable effectiveness, with a reported success rate of up to 100% in treating chlamydia.
To maximize its efficacy, it's crucial to adhere to a daily dosing regimen and abstain from sexual activity while taking the medication.
How do i know Doxycycline is working?
If your symptoms persist or worsen while on doxycycline, it's advisable to consult your doctor.
If you are experiencing symptoms, you should begin to notice improvement within 3 days of starting the treatment.
If you do not have any symptoms, you may not perceive any noticeable changes while the medication is actively combating the infection.
How long does Doxycycline stay in your Body?
Doxycycline takes around 5 days to completely leave your body after you take it. Doxycycline has a half-life of 16 to 22 hours, which is how long it takes for the levels of Doxycycline to fall by 50%.
It takes around 4 to 5 half-lives for a drug to be completely cleared from your system.
How to prevent chlamydia spread?
To prevent further spread of chlamydia infection, follow these steps:
- Re-test If Under 25: If you're under 25, get retested 3 months after Doxycycline treatment.
- Wait for a Negative Test: Tests may take 3-5 weeks to show negative results after successful treatment.
- Treat Both Partners Together: If you have chlamydia, make sure your partners also get treated together to prevent reinfection.
- No Sex During Treatment: Avoid sex while on Doxycycline treatment to avoid passing the infection.
- Consult Before Retreatment: Don't repeat Doxycycline treatment within 3 months without talking to your doctor. They may suggest additional tests, treatment, or advice on avoiding future infections.
These steps help stop chlamydia from spreading and ensure proper treatment.
Can I buy Doxycycline over the counter or get on the NHS?
No, It is not available over the counter, but you can get Doxycycline through the NHS by consulting your GP or visiting a local sexual health clinic.
Doxycycline Alternatives:
Doxycycline is the recommended and most effective treatment for chlamydia. However, if Doxycycline isn't suitable for you, Azithromycin Tablets may be an alternative to consider, although it's no longer the primary choice.
Is doxycycline better than azithromycin for chlamydia?
The effectiveness of doxycycline versus azithromycin for chlamydia treatment may vary depending on individual cases and factors.
While some studies have suggested that doxycycline may be more effective for chlamydia treatment, azithromycin is still a recommended and widely used treatment option for chlamydia.
The choice between the two antibiotics should be made in consultation with a healthcare provider based on the specific circumstances of the infection and individual patient considerations.
Summary of Doxycycline 100mg
Doxycycline is an antibiotic medication that is normally the first line treatment for chlamydia. Azithromycin and Doxycycline are equally effective in treating chlamydia.
Recommended as first line treatment due to the decreased chance of bacterial resistance. It should be taken twice daily for 7 days, the course should be completed regardless of whether your symptoms disappear or not. This is to reduce the risk of antibiotic resistance.
Author Bio
Name Mr Suhail Jamil Role Superintendent Pharmacist GPhc Number 2069518 Sources
Directions
Before taking Doxycycline for Chlamydia, talk to your doctor if You have:
Suspected syphilis.
A history of diarrhoea when taking antibiotics.
Porphyria, a rare blood disorder.
Systemic lupus erythematosus (SLE).
Myasthenia gravis, which causes muscle weakness.
If you have Liver or kidney problems.
Discuss these conditions with your doctor for safe use of Doxycycline.
Dosage
How much Doxycycline to take:
For chlamydia, the usual adult dose is:
Doxycycline 100 mg capsule twice a day for 7 days
Try to:
- Space doses evenly, for example, one capsule in the morning and one in the evening.
- Take capsules while sitting or standing and swallow whole with a glass of water.
- Take them at roughly the same times each day.
If Doxycycline upsets your stomach, you can take it with food or milk. If you are unsure, follow the advice on your prescription label or ask a pharmacist.
Duration of Doxycycline Treatment for Chlamydia:
Your prescriber will usually prescribe a 7-day course.
Always complete the full course, even if symptoms improve.
Doxycycline dosage for Malaria Prevention:
If Doxycycline is prescribed to prevent malaria:
- Start taking it 1 to 2 days before you travel to a malaria risk area.
- Continue taking it every day while you are away.
- Carry on for 4 weeks after you leave the area.
- Your doctor or pharmacist will confirm whether Doxycycline is appropriate for malaria prevention
for the country you are visiting.
Doc's Recommendation
- Complete full course of medication.
- Do not sex for 7 days after treatment is complete.
- Do not chew the tablet
Warnings
Can I Have Sex While Taking Doxycycline?
You should avoid sex until:
- You have completed the full 7-day course.
- At least 7 days have passed since your last dose.
- Your partner has also finished their treatment.
Having sex earlier can increase the risk of passing the infection back and forth, even if you feel better.
Doxycycline capsules are not suitable for everyone and may interact with some medical conditions or other medicines.
Do not take Doxycycline without medical advice if you:
- Have had an allergic reaction to Doxycycline or other antibiotics in the past.
- Are allergic to any of the ingredients in the capsules.
- Are pregnant, trying to conceive or breastfeeding.
Doxycycline 100 mg capsules may not be suitable if you:
- Have myasthenia gravis.
- Suspect syphilis.
- Have systemic lupus erythematosus (SLE).
- Are likely to be exposed to strong sunlight or UV light, for example, from sunbeds.
- Often have diarrhoea when taking antibiotics.
- Have porphyria.
- Have liver or kidney disease.
Always speak to a doctor or pharmacist if any of these apply to you before you buy Doxycycline online or start taking it.
Alcohol and Doxycycline
You should avoid alcohol while taking Doxycycline, as it can reduce how well the antibiotic works. Heavy or regular alcohol use can also increase the risk of liver problems when combined with Doxycycline.
Visual Disturbances
If you notice blurred or double vision, dizziness or any other visual changes while taking Doxycycline, do not drive or operate machinery and contact a doctor for advice.
Medicines That Can Interact With Doxycycline
Tell your doctor or pharmacist if you take any other medicines, including over the counter products or herbal remedies. Interactions are particularly important with:
- Antacids and indigestion remedies.
- Supplements or medicines containing calcium, aluminium, magnesium, zinc or iron.
Ciclosporin. - Strong sleeping tablets such as barbiturates.
- Warfarin or other medicines that thin the blood.
- Methotrexate.
- Vitamin A or retinoid medicines such as isotretinoin.
- Penicillin based antibiotics.
- Rifampicin.
- Ergotamine for migraine.
- Medicines for transplants or some skin conditions that contain ciclosporin.
Stomach ulcer medicines containing bismuth, such as some Pepto Bismol products.
Oral typhoid vaccine may not work properly with Doxycycline, although the injected typhoid vaccine is usually safe.
Mixing Doxycycline With Herbal Remedies and Supplements
Let your doctor know if you take vitamins or supplements, especially those containing:
- Aluminium, bismuth, calcium, magnesium or zinc.
- Iron supplements.
These can affect how well Doxycycline is absorbed, so you may be advised to avoid them or to separate the timing of your doses.
Doxycycline and the Contraceptive Pill
This patient information leaflet provided by The Electronic Medicines
Compendium advises that Ddoxycycline might reduce the effectiveness of some contraceptive pills and suggests using extra contraception during treatment and for 7 days afterwards.
The NHS and specialist guidance states that Ddoxycycline does not usually affect hormonal contraception. If Ddoxycycline causes vomiting or severe diarrhoea for more than 24 hours, your pill may not work properly and you should check the instructions that come with your contraceptive.
If you are unsure, speak to your GP, sexual health clinic or pharmacist for personalised advice.
NHS Advice on Doxycycline 100 mg
NHS guidance confirms that Doxycycline does not normally affect any type of contraception, including the combined pill and emergency contraception.
If you experience vomiting or severe diarrhoea for more than 24 hours, your pill may be less effective, so always follow the advice in your pill packet and use additional protection if needed.
FAQ
How does Doxycycline work?
Doxycycline belongs to a group of antibiotics called tetracyclines. It works by blocking the bacteria that cause infection from producing the proteins they need to grow and multiply. Without these proteins, the bacteria gradually die off and the infection clears.
When taken exactly as prescribed, Doxycycline is a highly effective treatment for chlamydia and many other bacterial infections.Do I still need to finish my treatment if my symptoms go away earlier?
Doxycycline should be taken twice daily for 7 days, the course should be completed regardless of whether your symptoms disappear or not. This is to reduce the risk of antibiotic resistance.
Should I lie down or sleep after taking Doxycycline capsules?
It is advisable to remain active for the first 30 minutes after taking your antibiotic treatment. Remaining active helps Doxycycline tablet move faster into your stomach preventing side effects such as throat irritation and oesophagus.
Can Doxycycline cause thrush?
Some people may get thrush (a fungal infection) after taking Doxycycline. Doxycycline is among the antibiotics that disrupt the normal functioning of the good bacteria that protect you from getting thrush. In case of thrush always consult your doctor.
Does Doxycycline Impact Contraception?
Doxycycline caps doesn't affect contraception, including the combined pill and emergency contraception. However, if doxycycline causes vomiting or severe diarrhea lasting over 24 hours, your combined pill might not fully protect against pregnancy. Check your pill instructions for guidance.
Can Doxycycline stain teeth?
Doxycycline can stick to calcium and potentially stain teeth, but this usually occurs in growing bones and teeth. Therefore, it's typically not prescribed to young children, during pregnancy, or while breastfeeding.
Should I use a different medicine instead of doxycycline to prevent sunlight reactions while taking malaria prevention medication in a hot country?
Doxycycline is commonly used in hot countries. To prevent sunlight reactions, take precautions like wearing protective clothing, a hat, sunglasses, and using sunscreen (SPF 30 or higher).If you have concerns, talk to your doctor or pharmacist.
Does Doxycycline impact contraception?
Doxycycline doesn't affect contraception, including the combined pill and emergency contraception. However, if doxycycline causes vomiting or severe diarrhea lasting over 24 hours, your combined pill might not fully protect against pregnancy. Check your pill instructions for guidance.
Is there any food or drink I need to avoid?
Besides moderate alcohol consumption, you can maintain your regular diet while taking doxycycline.
What is the 3 day chlamydia treatment?
Azithromycin tablets, taken over three days, can effectively clear a chlamydia infection within one week. It starts working in about 2 to 3 hours, and you should begin feeling better after a few days.
Is doxycycline 21 days for chlamydia?
For LGV proctitis (Lymphogranuloma Venereum (LGV) is a sexually transmitted infection (STI) caused by certain strains of Chlamydia trachomatis), doxycycline treatment lasted for 21 days, and the chlamydia DNA was no longer detectable after this extended treatment.
Side Effects
How long do Doxycycline side effects last?
You may stop experiencing common side effects such as headaches after stopping your medication. Sun sensitivity and esophagitis may last for two weeks after you quit taking your medication.
It is important to understand Doxycycline side effects and know when to consult a doctor. Below are some of the side effects of Doxycycline:
Common side effects.
Common side effects are manageable. However, if symptoms persist it is important to seek medical advice.
- Sunlight sensitivity
- Nausea
- Vomiting
- Headaches
- Loss of appetite
- Diarrhea
Uncommon side effects
You may not experience this type of side effects. It's important to seek medical attention if notice either of the below side effects.
- Thrush
- Heartburn
Rare side effects
They are side doxycyclin eside effects that are experienced on rare occasions, but serious enough to demand medical attention. Always consult a doctor when you experience this type of side effects.
- Liver failure
- Flushing
- Anxiety
- Decreased appetite
- Severe headache
Please read the patient leaflet carefully to learn about more detail about Doxycycline side effects.
How to manage Doxycycline side effects?
Some of the common side effects are manageable at home. Changing your lifestyle habits may help as well as consulting your doctor.
Managing headache: You can manage headache side effects by taking plenty or enough water every day. Also, you can buy over-the-counter painkillers to treat headaches.
Managing stomach problems: An upset stomach can be uncomfortable. It's important to take your Doxycyclin tablets with food while sitting in an upright position. Also, avoid spicy foods and dairy products while taking Doxycycline medication.
Managing sun sensitivity
While taking Doxycyclin medication, you may experience itchiness and rashes when exposed to sunlight. Here are a few ways you can manage sun sensitivity:
- Wearing sunglasses
- Using sunscreen lip balm
- Wearing light loose clothes and covering your skin completely
- Avoiding frequent exposure to sunlight
- Wearing sunscreen when exposed to high SPF
Managing dizziness and fatigue
Experiencing side effects such as fatigue and dizziness shows signs of low blood pressure. If you experience dizziness and fatigue it is important to seek medical advice from a doctor or blood pressure testing.
Information
Doxycycline Patient Information Leaflet
Doxycycline 120mg Capsules full specificaion
| Type of Medication | Tetracycline antibiotics |
| Dosage form | 3 Oral form available- tablet,capsule, and suspension |
| Dosage for Infection (18–64 years) | Take 100mg of Doxycycline twice daily for 7 days |
| Dosage for Malaria Prevention (18–64 years) | Take 100 mg every day. Begin 1 to 2 days before going to a malaria area and continue for 4 weeks after leaving |
| Works by | inhibiting the growth and spread of bacteria in the body |
| Success Ratio | 100% in Chlamydia Treatment |
| Side Effects | Common side effects include headaches, nausea, and increased sun sensitivity |
| Storing Room Temperature | between 69°F and 77°F (20°C and 25°C) |
| Per Pack size | 14 Capsules |
Delivery
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Orders placed after the cut-off on Friday will be delivered on Tuesday.
Price Comparison
| Medication | Ashcroft Pharmacy |
|---|---|
| 100mg x14 Capsules | £13.50
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Written and reviewed by our qualified team
Authored by:
Mr Suhail Jamil
Superintendent Pharmacist
GPhC Number: 2069518
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