Biofloxx 500 contains ciprofloxacin 500 mg, a prescription antibiotic. It treats bacterial infections — urinary, gut, bone and prostate infections, and typhoid. It does not treat a yeast infection, and taking an antibiotic for thrush usually makes it worse.
What is Biofloxx?
Biofloxx 500 contains ciprofloxacin 500 mg. It is a Schedule 4 prescription medicine in South Africa — not a supplement, not a general-sale product, and not something to take on someone else’s recommendation.
Ciprofloxacin is a fluoroquinolone antibiotic. It blocks two bacterial enzymes — DNA gyrase and topoisomerase IV — that bacteria need to unwind and copy their DNA. Without them the bacterium cannot replicate and dies. Human cells use structurally different enzymes, which is the basis of its selectivity.
The same ingredient is dispensed as Ciprofloxacin, Cifran, Ciprobay and Ciplox.
It is powerful, and its use has been deliberately narrowed. Regulators worldwide have restricted fluoroquinolones after recognising rare but serious and sometimes long-lasting effects on tendons, muscles, joints and the nervous system. Current guidance is that ciprofloxacin should not be used for mild or self-limiting infections, or where a safer antibiotic would do.
So being prescribed it is not a sign of a worse infection — it usually means the organism, the site, or your allergies made it the appropriate choice.
What is Biofloxx commonly used for?
- Urinary tract infections, including complicated infections and kidney infections (pyelonephritis).
- Prostate infections (prostatitis), where its tissue penetration is a genuine advantage.
- Gut infections — bacterial gastroenteritis, shigellosis, campylobacter, and severe travellers’ diarrhoea.
- Typhoid fever.
- Bone and joint infections, including osteomyelitis, often as long courses.
- Some respiratory infections, particularly involving Pseudomonas.
- Some sexually transmitted infections, in specific circumstances and according to current local treatment guidelines.
It does not treat a yeast infection
People search for this specifically, so it is worth being direct.
Thrush is a fungal infection, caused by Candida. Antibiotics kill bacteria and have no effect on fungi whatsoever.
Antibiotics are among the commonest causes of thrush. Your body normally carries bacteria that keep candida in check. An antibiotic course reduces those bacteria, candida overgrows, and thrush follows. Taking ciprofloxacin for a yeast infection does not merely fail — it is likely to make the problem worse.
Thrush is treated with an antifungal — clotrimazole cream or pessary such as Canex V, or oral fluconazole.
And the symptoms overlap. Vaginal discomfort, discharge and burning can be thrush, bacterial vaginosis, trichomoniasis, chlamydia, gonorrhoea or a urinary infection — all needing different treatment. Guessing is how people end up treating the wrong thing for weeks. See a doctor, nurse or pharmacist and get it identified.
For uncomplicated cystitis in an otherwise healthy woman, ciprofloxacin is generally no longer first choice — nitrofurantoin or another narrower agent is preferred, precisely because of the fluoroquinolone cautions.
How Biofloxx fits into this medicine category
| Group | Examples | Common targets |
|---|---|---|
| Fluoroquinolones | Ciprofloxacin (Biofloxx, Cifran) | Urinary, gut, bone, prostate, Pseudomonas |
| Broad-spectrum penicillins | Amoxicillin | Chest, ear, throat, dental |
| Macrolides | Azrotrin (azithromycin) | Chest, some STIs; penicillin allergy |
| Sulfonamide combinations | Co-trimoxazole (Durobac) | Urinary, chest, PCP |
| Nitroimidazoles | Metronidazole | Anaerobic and dental infections |
No antibiotic is “strongest” in general — the right one depends on the organism, the site of infection, your allergies and local resistance patterns. See the antibiotics and antimicrobials hub.
What to check before using Biofloxx
Check that it was prescribed for you, by name, for this episode. That is the first check with a Schedule 4 medicine. Leftover antibiotics from someone else’s course are a common and genuinely harmful habit — the amount is incomplete, the medicine may be wrong for your infection, and partial courses drive resistance.
Separate it from dairy, antacids, and iron, zinc, calcium or magnesium supplements by at least two hours — take it two hours before or six hours after. Those minerals bind ciprofloxacin in the gut and can reduce absorption enough for the treatment to fail. Milk, yoghurt, indigestion remedies and multivitamins all count.
Drink plenty of water, avoid excessive sun, and finish the whole course.
Tell your prescriber or pharmacist if:
- You have a history of tendon problems, or tendon trouble on a previous quinolone.
- You take a corticosteroid such as prednisone — combined with ciprofloxacin this markedly increases tendon rupture risk, particularly over 60.
- You have epilepsy or a seizure history. Ciprofloxacin lowers the seizure threshold.
- You have myasthenia gravis, which it can seriously worsen.
- You have a heart rhythm problem, particularly a long QT interval.
- You have kidney or liver disease.
- You have an aortic aneurysm or a connective tissue condition such as Marfan syndrome.
- You are pregnant or breastfeeding, or the medicine is for a child — fluoroquinolones are generally avoided in both.
- You take theophylline, warfarin, tizanidine, methotrexate, an NSAID, or a diabetes medicine.
- You drink significant caffeine — ciprofloxacin raises caffeine levels and can cause jitteriness and palpitations.
Follow the dispensing label. This page does not set doses.
Possible cautions and when to ask a pharmacist or doctor
Tendon problems are the signature caution. Ciprofloxacin can cause tendon inflammation and, rarely, rupture — most often the Achilles. It can happen within days of starting, and occasionally weeks after finishing. Risk is higher over 60, on corticosteroids, and after a transplant.
If you develop pain, swelling or inflammation in a tendon — commonly the back of the ankle — stop taking it and contact your doctor. Rest the limb and avoid exercise until you have been assessed. Do not train through it.
Nerve effects. Peripheral neuropathy — pain, burning, tingling, numbness or weakness — can begin soon after starting and may be long-lasting. Report it immediately rather than finishing the course and hoping.
Central nervous system effects are recognised: confusion, agitation, anxiety, depression, insomnia, hallucinations and, rarely, seizures.
Diarrhoea. Severe, watery or bloody diarrhoea, particularly with fever and particularly after the course ends, can indicate Clostridioides difficile infection.
Blood sugar can swing in either direction in people with diabetes.
Do not take leftover antibiotics, and do not share them.
Seek urgent medical attention for tendon pain or swelling, sudden severe pain in the ankle or calf, numbness or tingling in the limbs, confusion or hallucinations, a seizure, severe abdominal or back pain, palpitations or fainting, a rash that blisters or peels, facial or throat swelling, or severe or bloody diarrhoea.
See a doctor or clinic for any urinary, vaginal or sexually transmitted symptoms rather than self-treating — the treatments differ and the wrong one delays recovery.
Related medicine guides
Frequently asked questions
What is Biofloxx 500 used for? Bacterial infections — urinary, gut, bone and prostate infections, and typhoid. It contains ciprofloxacin 500 mg, a prescription antibiotic.
Is Biofloxx a supplement? No. It is a Schedule 4 prescription antibiotic and needs a doctor’s prescription.
Is Biofloxx used for a yeast infection? No. Thrush is fungal, and antibiotics have no effect on fungi — they are in fact a common cause of thrush. It is treated with an antifungal.
Can I use it for an STI? Only if a clinician has diagnosed the infection and prescribed it. Treatment guidelines change with resistance, and partners usually need treating at the same time.
Can I take it with my vitamins? Separate them by at least two hours. Calcium, magnesium, iron and zinc bind ciprofloxacin and can stop it working.
Someone gave me these tablets. Can I take them? No. Never take an antibiotic prescribed for someone else — the medicine may be wrong for your infection, and partial courses drive resistance.