Clinical medicine profile
Aceclofenac / Paracetamol /Chlorzoxazone
Non-opioid analgesic / antipyretic
- Route
- ORAL / RECTAL / IV
- Schedule
- POM
- ATC
- Not assigned
- PPB status
- registered
Safety essentials
The information most likely to change a prescribing or dispensing decision.
Contraindications
- [Aceclofenac] Active peptic ulcer / GI bleeding.
- Severe heart failure.
- NSAID-exacerbated respiratory disease (aspirin-sensitive asthma) for non-selective agents.
- Third trimester pregnancy (ductus arteriosus, oligohydramnios — class warning).
- Severe renal impairment for many agents.
- Hypersensitivity to NSAIDs. [Paracetamol] Severe active hepatic disease / acute liver failure.
- Hypersensitivity.
- Chronic heavy alcohol use — use reduced maximum daily dose or avoid. [Chlorzoxazone] Hypersensitivity to the active substance or excipients.
- Additional absolute contraindications are indication- and product-specific — consult SmPC.
Precautions
- [From component Paracetamol] Risk of severe hepatotoxicity in overdose.
- Chronic high-dose use, malnutrition, enzyme-inducing drugs, and alcohol increase risk.
- Check total daily intake from all sources.
Dosing matrix
Population and organ-function guidance, shown together for faster comparison.
Dosing is indication-, age-, weight- and organ-function-specific for this INN. Do not use class averages for high-risk patients. Confirm the exact regimen in the current SmPC and Kenya Standard Treatment Guidelines. Typical professional workflow: (1) confirm indication, (2) check renal/hepatic function, (3) screen interactions/allergies, (4) select dose/route/duration, (5) define monitoring.
Paediatric dosing is weight- and age-based; use a paediatric formulary / SmPC. Do not extrapolate adult tablets without calculation.
Generally safe; prolonged high dose rare associations — prefer careful use in advanced CKD.
- CrCl 0–120: Confirm renal dosing in product SmPC / primary label.
PRIMARY toxicity organ in overdose; therapeutic doses usually safe if daily limits respected.
Use, effects & interactions
Indications
- Therapeutic use is agent- and indication-specific within the class (Non-opioid analgesic / antipyretic).
- Use according to culture results, national guidelines (Kenya STG/EML where applicable) and the current product SmPC.
- Spastic Pain
Adverse effects
- [Aceclofenac] Dyspepsia, nausea, fluid retention, raised BP.
- Serious: peptic ulcer/bleed, AKI, heart failure exacerbation, severe skin reactions, bronchospasm, hepatitis (rare). [Paracetamol] Rare at therapeutic doses.
- Serious: acute liver failure in overdose, rare severe skin reactions (SJS/TEN/AGEP). [Chlorzoxazone] ADVERSE REACTIONS Chlorzoxazone containing products are usually well tolerated.
- It is possible in rare instances that chlorzoxazone may have been associated with gastrointestinal bleeding.
- Drowsiness, dizziness, lightheadedness, malaise, or over-stimulation may be noted by an occasional patient.
- Rarely, allergic type skin rashes, petechiae, or ecchymoses may develop during treatment.
- Angioneurotic edema or anaphylactic reactions are extremely rare.
- There is no evidence that the drug will cause renal damage.
- Rarely, a patient may note discoloration of the urine resulting from a phenolic metabolite of chlorzoxazone.
- This finding is of no known clinical significance.
- To report SUSPECTED ADVERSE EVENTS, contact Aurobindo Pharma USA, Inc. at 1-866-850-2876 or FDA at 1-800- FDA-1088 or http://www.fda.gov/ for voluntary reporting of adverse reactions.
Drug interactions
Open multi-drug checker ↗- Fixed-dose/multi-ingredient product.
- Clinical details partially inherited from component monographs: Paracetamol, Chlorzoxazone.
- Confirm combination SmPC for exact dosing.
Mechanism & disposition
Combination product.
Read complete mechanism
Combination product. Component mechanism (Paracetamol): Inhibitors of cyclo-oxygenase [COX-1 and COX-2] enzyme that catalyzes the conversion of arachidonic acid to PGH2.
30–60 minutes oral
4–6 hours
ORAL / RECTAL / IV
(glucuronidation/sulfation); toxic NAPQI pathway via CYP2E1 when pathways saturated or glutathione depleted.
~2–3 h; prolonged in liver disease/overdose.
Pregnancy, lactation & diet
[Aceclofenac] Avoid in third trimester. Earlier pregnancy: use only if needed; prefer paracetamol first-line. [Paracetamol] Analgesic/antipyretic of choice in pregnancy when needed; use lowest effective dose/shortest duration. [Chlorzoxazone] Use only if potential benefit justifies potential risk; prefer agents with better reproductive data when alternatives exist.
[Aceclofenac] Short-course ibuprofen generally acceptable; avoid chronic high-dose/long half-life agents when possible. [Chlorzoxazone] Assess infant risk vs benefit of maternal therapy; prefer agents with lactation data.
Brands & loaded prices
| Brand | Manufacturer | Pack | Observed price |
|---|---|---|---|
| Lysodol MR | Meyer | mg/ 250mg 30s | Unavailable |
| RasecMR | Prisma | mg/ 500mg 10's | Unavailable |
| RilifMR | Unicom | mg/ 375mg 20's | Unavailable |
Sources & review state
Decision support only. Confirm patient-specific decisions against the current product SmPC, Kenya STG/EML, and professional judgement.