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What causes chlamydia?

The infection itself is caused by a bacterium called chlamydia trachomatis. The bacteria can be found in both semen and vaginal fluid, meaning that it can be spread through unprotected vaginal, anal or oral sex. It can also spread through sharing sex toys as it is present in even trace amounts of fluids.

What are the symptoms?

Of the people who contract the infection, 50% of men and 75% of women will not present any symptoms at all, so it's important not to rely on this to ensure you are not infected. However, some symptoms include pain during urination and unusual discharge or bleeding from the vagina, penis or anus. The symptoms can often be confused with other less serious conditions as the symptoms may disappear, but that does not mean the infection is cured.

Are there any complications which can arise from contracting chlamydia?

If it is identified in its early stages, most cases of chlamydia can be easily treated with no further complications. However, if left untreated it can cause serious health problems. For women, if untreated it can lead to pelvic inflammatory disease (PID), which causes inflammation of the ovaries, uterus and fallopian tubes and can cause scarring, infertility and a propensity to other infections.

In men, untreated chlamydia can lead to inflammation of the testicles and a decrease in male fertility, as they may no longer be able to produce sperm.

What medication is available to treat chlamydia?

There are two types of antibiotic that are used to cure Chlamydia, prescribed at different stages. Doxycycline is the first line treatment with a 100 mg tablet taken twice daily for seven days.

Azithromycin is a second line treatment with a single 1 g dose followed by a 500 mg tablet taken once daily for two days.

Can you buy the medication online?

Both treatments are available to buy online at 121doc. In order to ensure the medication is safe and effective for you to use, you will be required to complete a free and confidential online consultation. You will then be issued a prescription so that the pharmacy can dispense your order for free next day delivery and your medication could be with you within 24 hours.

Our sexual health blog posts will give you lots more information on STI's and other general health issues in an easy to understand format.

View all treatments

  • Review by a qualified doctor
  • Including prescription
  • Next-day delivery included


What is included in the online consultation?
Will a doctor review my consultation?
What happens after I submit my order?
Is the price all-inclusive?
Can I place more than one order at a time?
What are my delivery options?
Is it safe to buy prescription medication online?
How do I know which treatment is best for me?
Is this service discreet?
What is included in the online consultation?

Our consultations include general questions about your health (e.g. blood pressure levels, current and past conditions), as well as specific questions related to your selected treatment. We will also request relevant personal information to complete payment and delivery.

All questions are necessary, and your answers and details will not be shared with any third-parties. Only our doctors have access to your medical information.

Will a doctor review my consultation?

It is a legal and medical requirement that a doctor first reviews all completed consultations. We have a team of in-house doctors and specialists who will ensure your selected treatment is safe for your use. All information is stored securely and confidentially.

Please note, we do not guarantee that our doctors will approve treatment.

What happens after I submit my order?

Your consultation will be sent directly to our medical team, where it will be reviewed by one of our doctors.

If your chosen treatment is deemed suitable for your use, they will issue a prescription. Your prescription is then forwarded to our pharmacy, where your medication will be dispensed and dispatched for courier delivery.

Is the price all-inclusive?

Yes. All 121doc orders include a medical consultation, a prescription and next-day delivery. There are no additional costs. We believe in providing a safe and easy-to-use service.

Can I place more than one order at a time?

Yes. However, certain medications may negatively interact with each other. Our doctors may not approve your order on this basis.

You can place multiple items in one basket, and complete a consultation for all.

If you wish to place a second order for a different medication, you will have to complete a separate consultation.

What are my delivery options?

We offer several delivery options:

  • Next-day delivery
  • UPS Access Point - convenient parcel drop-off and collection near your home or work address
  • Nominated-day delivery - choose the most convenient day for delivery

All these options can be tracked and require a signature on delivery. If you are not available, a friend or relative can sign in your place.

None of these options will incur an additional charge.

Is it safe to buy prescription medication online?

To ensure you are purchasing from a reputable company, you should look to see their country’s regulatory bodies verify them.

In the UK, this is the Care Quality Commission (CQC) and the Medicines and Healthcare products Regulatory Agency (MHRA).Certificates can be viewed here.

How do I know which treatment is best for me?

Some treatments also offer the 'Advise Me' function. You will be asked questions about your lifestyle and needs, plus medical questions. You will then be presented with the advice of our doctors.

Is this service discreet?

Our patients’ privacy is of utmost importance. All your medical information is securely stored and only viewed by our doctors. We do not share your details with third-parties. We are also regularly inspected by various UK regulatory agencies, such as the Information Commissioner's Office (ICO).

All orders will only show on invoices, bank statements, etc. as ‘HHC Ltd’.