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Quick summary

Type of medicine




Active Ingredient

Doxycycline Hyclate

Effective within

Varies based on infection type

Works by

Inhibiting bacterial growth

Side effects

Nausea, vomiting, skin reactions, difficulty breathing

Medication details


Doxycycline is a broad-spectrum antibiotic medication commonly used to treat various bacterial infections, including respiratory infections, skin and soft tissue infections, and genital and urinary tract infections. Its effective against a range of bacteria, making it a versatile choice for treating a variety of conditions. Doxycycline works by inhibiting the growth and spread of bacteria, allowing the body's immune system to fight the infection. This medication is available in both oral and intravenous forms, making it a convenient option for those who require treatment. With proper use, doxycycline is a safe and effective medication for treating bacterial infections.


To ensure the effectiveness of Doxycycline, follow these guidelines:
Swallow the capsules with plenty of water.
Take the capsules at the same time each day while sitting or standing.
Avoid lying down for at least 30 minutes after taking the capsules to prevent irritation.
Depending on the type of infection, Doxycycline can be taken with or without food.
If stomach upset occurs, taking Doxycycline with food or milk is recommended.
Dosage recommendations for various infections are provided, including acne, sexually transmitted diseases, and more. It's essential to adhere to your prescribed dosage and continue treatment as directed by your doctor.


Doxycycline 100mg Capsules are composed of the active ingredient doxycycline hyclate, a member of the tetracycline antibiotic class. This formulation conforms to the rigorous quality standards upheld by the UK's healthcare system, ensuring safe and effective treatment for various bacterial infections.
Active Ingredient:
Doxycycline Hyclate - 100mg
Mechanism of Action:
Doxycycline operates by inhibiting bacterial protein synthesis, an essential process for bacterial growth and multiplication. This action curtails the spread of harmful bacteria, aiding the body's immune system in combating infections effectively.
Additional Components:
Inert pharmaceutical-grade ingredients are also part of the capsule composition, contributing to the stability, disintegration, and bioavailability of the medication. These inactive ingredients are carefully selected to ensure optimal delivery and therapeutic efficacy.

Side Effects

While Doxycycline is generally well-tolerated, some side effects may occur:
Common side effects include nausea, vomiting, and upset stomach.
More severe reactions are rare but may include difficulty breathing, severe diarrhea, skin reactions, and visual disturbances.
If you experience any side effects, contact your doctor or pharmacist immediately.


Before starting Doxycycline, it's crucial to consider certain factors:
Allergic Reactions: Do not take Doxycycline if you are allergic to doxycycline or other tetracycline antibiotics.
Pregnancy and Breastfeeding: Do not use Doxycycline if you are pregnant or breastfeeding. It may affect tooth development in children and cause permanent discolouration.
Sun Sensitivity: Doxycycline can make your skin more sensitive to sunlight, so avoid excessive sun exposure and use protective measures.
Kidney or Liver Problems: Consult your doctor before taking Doxycycline if you have kidney or liver issues.
Other Medications: Inform your doctor about other medicines you are taking, as some medications can interact with Doxycycline. Do not take iron, zinc or indigestion remedies for 2 hours before and 2 hours after this medicine.

Complete the prescribed course.

Medically reviewed and published

  • This page was medically reviewed by Dr Sohaib Imtiaz, Clinical Lead on Aug 24, 2023, 3:30 pm

How it works

Start a consultation for your condition, select a treatment option, and our in-house clinicians will review and prescribe if suitable. Expect your order within 1-3 working days.

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Please read our FAQs page to find out more.

Can I take Doxycycline with dairy products?

It is generally recommended to avoid consuming dairy products, calcium supplements, or antacids within a few hours of taking Doxycycline. These items can interfere with the absorption of the medication in the body.

Is Doxycycline safe for individuals with a history of liver disease?

If you have a history of liver disease, it's important to discuss this with your healthcare provider before starting Doxycycline. Your doctor will determine if the medication is suitable for you and may adjust the dosage accordingly.

Can Doxycycline be used to treat tooth infections?

Doxycycline is not typically used to treat tooth infections. If you suspect a dental infection, it's best to consult a dentist who can recommend appropriate treatments.

Does Doxycycline interact with hormonal contraceptives?

Yes, Doxycycline can reduce the effectiveness of hormonal contraceptives (birth control pills). It is recommended to use additional forms of contraception, such as condoms, while taking Doxycycline and for a week after completing the course.

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