Paracetamol Ratio (Paracetamol)

Paracetamol acts as an analgesic and antipyretic across several common conditions.

• Fever: lowers elevated body temperature.
• Headache: relieves tension‑type and mild migraine pain.
• Dental pain: reduces discomfort after dental procedures.
• Musculoskeletal pain: eases sore muscles and minor joint aches.
• Cold‑related aches: mitigates body aches associated with viral infections.

• Paracetamol exerts its effect primarily through inhibition of the cyclooxygenase (COX) enzymes in the central nervous system, particularly COX‑2, leading to reduced synthesis of prostaglandins involved in pain and temperature regulation. Its peripheral anti‑inflammatory activity is minimal, which distinguishes it from non‑steroidal anti‑inflammatory drugs.

Paracetamol is generally well tolerated, but adverse reactions can occur.

Common Side Effects

• Nausea: mild stomach upset may be experienced.
• Abdominal discomfort: occasional stomach pain or indigestion.
• Rash: skin redness or mild itching.
• Elevated liver enzymes: transient increase detectable in blood tests.
• Dizziness: brief sensation of light‑headedness.

Serious or Rare Side Effects

• Hepatotoxicity: severe liver injury, especially with overdose.
• Stevens‑Johnson syndrome: rare, severe skin reaction.
• Blood disorders: aplastic anemia or thrombocytopenia.
• Hypersensitivity reactions: anaphylaxis or severe allergic response.
• Renal impairment: rare kidney function decline with prolonged high‑dose use.

Paracetamol should be used with careful consideration of patient‑specific factors.

• Assess liver function: evaluate hepatic health before initiating therapy.
• Avoid alcohol: concurrent intake increases risk of liver damage.
• Use lowest effective dose: minimize exposure while achieving symptom control.
• Monitor elderly patients: increased susceptibility to adverse effects.
• Store at ambient temperature: keep in the original pack, protect from moisture.

Paracetamol can interact with several medicines, requiring attention to avoid adverse outcomes.

Major Interactions (Avoid)

• Warfarin: increased anticoagulant effect, raising bleeding risk.
• Alcohol: synergistic hepatotoxicity, potentially leading to liver injury.
• Isoniazid: heightened risk of liver toxicity.

Moderate Interactions (Monitor Closely)

• Carbamazepine: may reduce paracetamol efficacy.
• Phenobarbital: can lower plasma concentrations of paracetamol.
• Oral contraceptives: may slightly reduce contraceptive effectiveness.