Pharma_Studio_Pharmacology_Notes_About_Analgesics

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DRUG CLASS: ANALGESICS (NSAIDs – Paracetamol / Ibuprofen)

1. Definition

Analgesics are drugs used to relieve pain without causing loss of consciousness.

2. Classification

A. Non-Opioid Analgesics

  • Paracetamol (Acetaminophen)
  • Ibuprofen
  • Aspirin

B. Opioid Analgesics

  • Morphine
  • Codeine
  • Tramadol

3. Mechanism of Action (MOA)

NSAIDs:

  • Inhibit Cyclooxygenase (COX-1 & COX-2)
  • Decrease prostaglandin synthesis
Effects:

  • Reduced pain
  • Reduced inflammation
  • Reduced fever

4. Indications

  • Mild to moderate pain
  • Fever
  • Inflammation (e.g., arthritis)
  • Headache
  • Menstrual pain

5. Side Effects

Common:

  • Gastric irritation
  • Nausea
  • Vomiting

Serious:

  • Gastrointestinal bleeding
  • Kidney damage
  • Liver toxicity (especially Paracetamol overdose)

6. Contraindications

  • Peptic ulcer disease
  • Severe liver disease
  • Severe kidney impairment
  • Hypersensitivity to NSAIDs

7. Nursing Considerations

  • Administer with food to reduce gastric irritation
  • Monitor liver and renal function
  • Avoid overdose (especially Paracetamol)
  • Educate patients on correct dosage

8. Clinical Tips (Exam Focus)

  • Paracetamol overdose → Liver failure
  • Ibuprofen → Gastric irritation
  • Aspirin → Avoid in children (Reye’s syndrome)

9. Memory Trick

  • “NSAIDs = Pain ↓ + Fever ↓ + Inflammation ↓”
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