Key Facts
- Drug Class
- Tetracycline antibiotic
- Prescription
- Required
- NAFDAC Status
- NAFDAC Registered
- Forms
- Capsule, Tablet, Injection
- Price Range
- ₦500 - ₦6,500
- WHO Essential
- Yes
What is Doxycycline?
Doxycycline is one of the most versatile and widely prescribed antibiotics in Nigeria, belonging to the tetracycline class of antibiotics. It works by inhibiting bacterial protein synthesis — specifically, it binds to the 30S ribosomal subunit and prevents the attachment of aminoacyl-tRNA, which bacteria need to build the proteins essential for their survival and reproduction. Doxycycline has a remarkably broad spectrum of activity, effective against gram-positive and gram-negative bacteria, as well as atypical organisms like Chlamydia, Mycoplasma, and Rickettsia. This breadth of coverage makes it invaluable in Nigerian clinical practice, where diagnostic laboratory facilities are not always readily accessible and clinicians often need to cover multiple potential pathogens.
In Nigeria, doxycycline is prescribed across a wide range of conditions — from sexually transmitted infections (particularly chlamydia and syphilis) to respiratory tract infections, acne, and even as malaria prophylaxis for travellers. It is widely known by the brand name Doxytet (Aspen Pharmacare), though the original brand Vibramycin (Pfizer) and locally manufactured options like Doxycap (Fidson Healthcare) are also available. The standard 100mg capsule is the most commonly dispensed formulation. Unlike many older tetracyclines, doxycycline can be taken with food (which actually helps reduce the common side effect of nausea), making it more tolerable for patients.
Doxycycline has gained particular importance in Nigeria's STI treatment landscape. With the high prevalence of chlamydial infections and the increasing recognition of non-gonococcal urethritis and pelvic inflammatory disease, doxycycline is a first-line treatment recommended by both the WHO and Nigerian STI treatment guidelines. It is also used in syndromic management protocols at primary healthcare centres where specific STI testing may not be available. However, like all antibiotics, doxycycline should only be used when appropriately indicated. Patients must complete the full course and should be aware of important precautions, particularly the risk of severe sunburn (photosensitivity) and the requirement to take capsules with plenty of water while sitting or standing upright to prevent oesophageal irritation.
What is Doxycycline used for?
In Nigeria, Doxycycline is commonly used for:
- Sexually transmitted infections — first-line treatment for chlamydia (Chlamydia trachomatis) and a key part of syndromic management of urethral discharge and pelvic inflammatory disease in Nigeria
- Respiratory tract infections — community-acquired pneumonia, acute bronchitis, and atypical pneumonia caused by Mycoplasma or Chlamydophila
- Acne vulgaris — one of the most commonly prescribed oral antibiotics for moderate to severe acne in Nigerian dermatology practice
- Syphilis — alternative treatment for early syphilis in patients allergic to penicillin
- Malaria prophylaxis — used by travellers to malaria-endemic areas; also used by non-immune visitors to Nigeria
- Lyme disease, Q fever, and rickettsial infections
- Cholera — adjunct to rehydration therapy for severe cholera
- Pelvic inflammatory disease (PID) — typically combined with ceftriaxone and metronidazole in Nigerian treatment protocols
- Periodontal (gum) disease — used in dental infections
Dosage
IMPORTANT
Always follow your doctor's or pharmacist's instructions. The information below is for general reference only.
Adults
The standard adult dose for most infections is 200mg on the first day (given as 100mg every 12 hours or 200mg as a single dose), followed by 100mg once daily for the remainder of the course. For chlamydia: 100mg twice daily for 7 days. For acne: 50mg to 100mg once daily for 6 to 12 weeks. For malaria prophylaxis: 100mg once daily, starting 1 to 2 days before travel, throughout the trip, and for 4 weeks after leaving the malaria area. Capsules should be taken with a full glass of water while sitting or standing upright — do not lie down for at least 30 minutes after taking the dose to prevent oesophageal ulceration.
Children
Doxycycline should NOT be used in children under 8 years of age unless no other suitable antibiotic is available, as tetracyclines can cause permanent yellow-brown discolouration of developing teeth and may affect bone growth. For children aged 8 years and older weighing less than 45kg: 2mg per kilogram twice daily on the first day, then 2mg per kilogram once daily. Children weighing 45kg or more can receive the standard adult dose. Recent evidence suggests that short courses (5 days or less) of doxycycline in younger children may carry less risk of dental staining than previously thought, but this should only be considered under specialist guidance.
Elderly
No specific dose adjustment is needed based on age alone. However, elderly patients should be particularly careful about taking the medication with adequate water and remaining upright, as the risk of oesophageal irritation may be higher. Kidney impairment does not significantly affect doxycycline dosing (unlike other tetracyclines), making it a safer choice in elderly patients with reduced kidney function.
Take doxycycline with food or milk to reduce nausea — unlike older tetracyclines, food does not significantly reduce absorption of doxycycline. Swallow capsules whole with a full glass of water while sitting or standing upright. Do NOT lie down for at least 30 minutes after taking the dose. Avoid excessive sun exposure — doxycycline causes significant photosensitivity and you can develop a severe sunburn very quickly. Use sunscreen and wear protective clothing. Do not take doxycycline together with antacids, iron supplements, or calcium/magnesium supplements as these reduce absorption — space them at least 2 to 3 hours apart.
Side Effects
Common side effects
- •Nausea and vomiting — the most frequent side effect; reduced by taking with food
- •Diarrhoea and abdominal discomfort
- •Photosensitivity — increased sensitivity to sunlight causing exaggerated sunburn, particularly important in Nigeria's climate
- •Oesophageal irritation and ulceration — if capsules are taken without adequate water or while lying down
- •Vaginal yeast infection (candidiasis) — common in women taking any antibiotic course
Serious side effects — seek medical help immediately
- Severe photosensitivity reactions — blistering sunburn even with brief sun exposure; this is particularly relevant in Nigeria where people are frequently exposed to strong sunlight
- Oesophageal ulceration — can cause severe chest pain and difficulty swallowing if capsules lodge in the oesophagus; always take with plenty of water
- Intracranial hypertension (pseudotumour cerebri) — rare but serious, causing severe headache, blurred vision, and visual disturbances; risk increases when combined with vitamin A or retinoids
- Severe allergic reaction — skin rash, swelling, difficulty breathing
- Liver toxicity — rare, particularly with high doses or prolonged use
- Clostridium difficile-associated diarrhoea — severe, persistent diarrhoea that may occur during or after treatment
- Permanent tooth discolouration in children under 8 years — teeth develop a yellow-brown stain that cannot be removed
When to see a doctor
See a doctor promptly if you develop a severe sunburn or blistering skin reaction after sun exposure while taking doxycycline. Seek urgent medical attention if you experience severe chest pain or difficulty swallowing (which may indicate oesophageal ulceration), severe persistent headache or vision changes, severe diarrhoea that persists after stopping the antibiotic, yellowing of the skin or eyes, or signs of a severe allergic reaction including facial swelling or difficulty breathing. If you are in Nigeria during the dry season or any period of intense sunlight, be especially vigilant about sun protection while on doxycycline.
Warnings & Precautions
Do not take Doxycycline if you have:
- Known allergy to doxycycline or any other tetracycline antibiotic
- Children under 8 years of age — risk of permanent tooth discolouration and effects on bone growth (exceptions for life-threatening infections only)
- Pregnancy — doxycycline can cause permanent tooth discolouration in the developing baby and may affect foetal bone development
- Severe liver disease
- Concurrent use with oral retinoids (isotretinoin, acitretin) — increased risk of intracranial hypertension
Drug interactions
- •Antacids and mineral supplements (aluminium, magnesium, calcium, iron, zinc) — significantly reduce doxycycline absorption; take at least 2 to 3 hours apart
- •Oral contraceptive pills — doxycycline may reduce the effectiveness of hormonal contraceptives; use additional barrier contraception during treatment and for 7 days after
- •Warfarin — doxycycline may enhance the anticoagulant effect; INR monitoring is advisable
- •Phenytoin, carbamazepine, and barbiturates — these drugs accelerate the breakdown of doxycycline, reducing its effectiveness; higher doses of doxycycline may be needed
- •Methotrexate — increased risk of methotrexate toxicity
- •Ciclosporin — doxycycline may increase ciclosporin levels
- •Isotretinoin (used for acne) — do NOT combine with doxycycline due to the risk of intracranial hypertension
Pregnancy & Breastfeeding
Doxycycline is CONTRAINDICATED in pregnancy. It crosses the placenta and can cause permanent yellow-brown staining of the developing baby's teeth (which form during the second and third trimesters) and may inhibit bone growth. Tetracyclines including doxycycline have also been associated with liver toxicity in pregnant women, particularly when given intravenously. If an antibiotic is needed during pregnancy, safer alternatives include amoxicillin, erythromycin, and azithromycin. Doxycycline is excreted in breast milk in small amounts but is generally considered compatible with breastfeeding by most guidelines, as the calcium in breast milk binds to doxycycline and limits the infant's absorption. However, prolonged courses should be avoided during breastfeeding. Consult your doctor.
Brands of Doxycycline in Nigeria
4 brands available in Nigeria.
| Brand Name | Manufacturer | Strength | Form | NAFDAC Reg. No. |
|---|---|---|---|---|
| Doxytet | Aspen Pharmacare | 100mg | Capsule | |
| Vibramycin | Pfizer | 100mg | Capsule | |
| Doxycap | Fidson Healthcare | 100mg | Capsule | 04-1259 |
| Medomycin | Medochemie | 100mg | Capsule |
How to Verify Your Doxycycline is Genuine
- 1Check for a valid NAFDAC registration number on the packaging of all doxycycline products purchased in Nigeria
- 2Use the NAFDAC Mobile Authentication Service (MAS): scratch the verification panel and text the code to 38353 to confirm the product is genuine
- 3Purchase from licensed pharmacies and registered patent medicine stores only — doxycycline is a prescription antibiotic and should not be bought from unregistered vendors
- 4Inspect the capsules — genuine doxycycline capsules should be uniform in colour and size, with clear printing on the capsule shell. Reject any that appear discoloured, damaged, or inconsistent
- 5Check the packaging for the manufacturer's name, batch number, manufacturing date, and expiry date — all printing should be clear and not smudged or peeling
- 6Compare the price with expected market rates — if 100mg doxycycline costs significantly less than ₦200 per pack, it may be substandard
Doxycycline Price in Nigeria
Doxycycline prices in Nigeria typically range from ₦500 to ₦6,500 per pack, depending on the brand, strength, and where you buy it.
₦500 – ₦6,500
per pack
Prices vary by location and vendor. Last updated: 2026-02-17
Where to Buy
Purchase Doxycycline only from licensed pharmacies and verified distributors. Avoid buying medicines from unverified sources, roadside vendors, or unregistered market stalls.
Frequently Asked Questions
Sources
- •NAFDAC Greenbook — National Agency for Food and Drug Administration and Control registered products database
- •WHO Model List of Essential Medicines (23rd List, 2023)
- •British National Formulary (BNF)
- •Nigerian Standard Treatment Guidelines