- Rheumatoid arthritis
- Osteoarthritis
- Dysmenorrhea
- Mild to moderate pain
- Inflammation
- Fever
Mechanism of Action-
Both compounds belong to non-steroidal anti-inflammatory drugs which inhibits cyclooxygenase. Paracetamol is a derivative of acetaminophen, or paracetamol, with the molecular formula glycine, N, N-diethyl-,4-(acetylamino)phenyl ester. Paracetamol is a weak inhibition of COX-1 and COX-2, further inhibiting prostaglandin synthesis. Mefenamic acid is an anthranilic acid derivative. It exhibits anti-inflammatory, analgesic, and antipyretic activities.
Pharmacokinetics-
The combination is well orally absorbed. The volume of distribution of paracetamol and mefenamic acids are 1.29 l/kg and 1.06 L/kg respectively. Protein binding of paracetamol is very negligible and of mefenamic acid is 90%. They are metabolised in liver mainly by CYP enzymes. Paracetamol is mainly excreted in urine whereas mefenamic acid is excreted in both urine and bile as well. The half-life of propacetamol is of 3.6 h and of mefenamic acid is 2 hours.
Common side effect of the product includes:
- Nausea
- Vomiting, Diarrhea
- Indigestion
- Loss of appetite
- Heartburn
The product should not to be used in the following conditions:
-
Liver problems
- Severe renal impairment
- Peptic ulcers
- Pregnancy
Following drugs may interact with the combination:
-
Ibuprofen
- Celecoxib
- Duloxetine
- Diclofenac
- Fish oil (omega-3 polyunsaturated fatty acids)
- Sertraline
- Fluoxetine