There is no product called MZL on the South African Medicine Price Registry, so this page cannot tell you what it contains. “MZL 400” is most likely a tablet marking or an abbreviation rather than a registered brand name — and there are a few specific things it could be, which are worth ruling out before you take anything.
What is Mzl?
A search of the South African Medicine Price Registry — the official register of SAHPRA-approved medicines and their prices — returns no match for “MZL”.
That leaves several realistic possibilities, and the “400” alongside it is the most useful clue, because 400 mg is a common strength for a small number of very widely used medicines.
It may be an abbreviation for a generic name. Pharmacy and clinic labels abbreviate constantly, and letter clusters get written by hand and read back wrongly. Metronidazole 400 mg is by far the most likely candidate — it is dispensed enormously often in South Africa at exactly that strength, and “MZL” is a plausible shorthand or misreading of it. Mesalazine, used in inflammatory bowel disease, also comes as 400 mg. Either would be a reasonable guess — but a guess is not good enough to take a tablet on.
It may be a tablet imprint. Manufacturers press codes into tablets so a loose one can be traced. South Africa has no public imprint database, and almost every online pill identifier is American, so a confident-looking answer from one of those may belong to an entirely different medicine.
It may be a letters-and-numbers brand name. Generic manufacturers, particularly Indian ones, use these routinely. A product registered elsewhere under this name may contain something quite different from anything sold here.
It may be a supplement, which do not appear on the price registry the way registered medicines do.
This page will not guess for you. Telling you what an unidentified tablet probably contains could lead you to take it alongside something that interacts, at the wrong dose, or in place of treatment you actually need.
What is Mzl commonly used for?
Because nothing is registered under this name, there is no verified use to report. Here is how to find out what you have — quickly and free.
Take the tablet and any packaging to a pharmacist. This is the fastest and safest route. Pharmacists identify unfamiliar products routinely, have access to identification resources and wholesaler catalogues, and can often recognise a common generic on sight.
Read the label for the active ingredient. Registered South African medicines must list active ingredients and strengths, usually in small print near the brand name. The active ingredient is the information that matters — the brand name is packaging. Once you have it, you can look it up properly.
Look for a SAHPRA registration number. Its absence means the product is either a supplement or not registered here.
If it was dispensed to you, phone the pharmacy. They hold the record and can tell you exactly what was supplied. This also explains the very common situation where generic substitution means this month’s tablets look nothing like last month’s.
If it might be metronidazole, that is worth confirming rather than assuming, because metronidazole has a specific and important caution: do not drink alcohol while taking it or for a couple of days afterwards, as the combination causes severe flushing, nausea and vomiting in many people. That alone is a good reason to identify the tablet rather than take it blind.
Do not take a tablet you cannot identify — particularly if you take medicines for the heart, blood pressure, diabetes, epilepsy or HIV, or are pregnant or breastfeeding.
How Mzl fits into this medicine category
It does not, verifiably. But these categories are worth understanding when you go to identify what you have:
| Type | How to recognise it | What it means |
|---|---|---|
| Registered medicine | SAHPRA registration number; a schedule (S0–S6); named active ingredients | Assessed for safety, quality and effect |
| Health supplement | No schedule; often “complementary medicine” wording | Much lighter regulation |
| Imported product | Foreign language or address; no SA number | May not be assessed here at all |
| Unregistered or counterfeit | No traceable manufacturer; bought online; strong claims | Contents unknown and unreliable |
For registered products people commonly look up, see HP553 and K-Fenak OTC.
See the general medicines hub.
What to check before using Mzl
Before taking any tablet you cannot name:
- Identify the active ingredient, from packaging or from a pharmacist. Nothing substitutes for this.
- Confirm it was prescribed for you. Sharing prescription medicines is genuinely risky — doses are set for a particular person, weight, kidney function and set of other medicines.
- Check it against everything else you take, which cannot be done without knowing what it is.
- Check the expiry date, once you know what it is.
- Be particularly careful if you take heart or blood pressure medicines, blood thinners, diabetes medicines, epilepsy medicines, antidepressants or antiretrovirals.
- Be more cautious again if you are pregnant, breastfeeding, elderly, or considering giving it to a child.
- Treat strong claims as a warning sign. Products promising rapid weight loss, dramatic performance improvement or cures for chronic disease are the ones most often found to contain undeclared prescription medicines.
If you found it loose and have no idea how long it has been there, the sensible answer is disposal at a pharmacy rather than identification. A single tablet of unknown age and origin is not worth the risk.
Possible cautions and when to ask a pharmacist or doctor
Ask a pharmacist before taking it, not after. Identifying a tablet is routine work for them and takes minutes.
See a doctor if you have already taken it and feel unwell, if you are taking it for a symptom that has not improved, or if you are unsure what any of your regular medicines are — a medicines review is worth asking for, especially if you take several.
Get emergency help immediately for:
- A child who has swallowed an unidentified tablet, even if they seem completely well. Take the tablet and packaging. Several common medicines — blood pressure tablets, diabetes tablets, iron, paracetamol — can seriously harm a small child at doses trivial for an adult, and many cause no symptoms for hours.
- Swelling of the face, lips or tongue, or difficulty breathing.
- A widespread rash, particularly with blistering, peeling or fever.
- Chest pain, palpitations, fainting or a seizure.
- Severe drowsiness or confusion.
- Severe abdominal pain, vomiting blood, or black tarry stools.
- Any suspected overdose, deliberate or accidental, even if the person appears fine.
Take whatever you have with you — the tablet, the strip, the box. It is what allows anyone to work out what happened, and it often makes the difference between quick treatment and guesswork.
Return unwanted or unidentified medicines to a pharmacy for disposal. Do not flush them or put them in household rubbish, and keep them away from children until you do.
Related medicine guides
Frequently asked questions
What is MZL 400 used for? No product under that name appears on the South African Medicine Price Registry, so there is no verified answer. It is most likely an abbreviation or a tablet marking. Take the packaging to a pharmacist.
Could MZL be metronidazole? Possibly — metronidazole 400 mg is very commonly dispensed in South Africa and the abbreviation is plausible. But confirm it rather than assume, particularly because metronidazole must not be taken with alcohol.
Is MZL a registered medicine here? Not under that name. It may be an abbreviation, an imprint code, an imported product, or a supplement.
How do I find out what it contains? Read the active ingredients on the label, look for a SAHPRA registration number, and ask a pharmacist. If it was dispensed to you, phone the pharmacy.
Is it safe to take? Not without knowing what it is. It may interact with your other medicines, be the wrong dose, or not be what you think.
My tablets look different from last month. Why? Usually generic substitution — the same active ingredient from a different manufacturer looks different and carries a different marking. Your pharmacy can confirm it.
What should I do with unidentified tablets? Return them to a pharmacy for disposal, and keep them away from children until you do.