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Analgesics — NSAIDs & Opioids

General & Dental Pharmacology • NEET MDS Study Guide • AI-Generated Notes

⭐ High-Yield Facts for Exam

  • NSAIDs inhibit COX → less prostaglandin.
  • Ibuprofen common in dentistry.
  • Celecoxib = COX-2 selective.
  • Paracetamol = safest in pregnancy; NAC antidote.
  • NSAIDs → GI, renal, antiplatelet effects.

Analgesics — NSAIDs & Opioids

NSAIDs

  • Inhibit cyclo-oxygenase (COX) → less prostaglandin → analgesia/anti-inflammatory effect.
  • Ibuprofen — commonly prescribed in dentistry; celecoxib = COX-2 selective (less GI upset).
  • Adverse effects: GI irritation/ulcer, renal effects, antiplatelet (aspirin is irreversible).

Paracetamol (Acetaminophen)

Analgesic/antipyretic with minimal anti-inflammatory action; considered the safest analgesic in pregnancy; hepatotoxic in overdose (antidote: N-acetylcysteine).

Opioids

Act on µ-receptors for severe pain; risks include respiratory depression, constipation and dependence.

Exam Tips ⭐

Ibuprofen common in dentistry; celecoxib = COX-2 selective; paracetamol = safest in pregnancy; NSAIDs → GI risk.

📝 Practice MCQs — Analgesics — NSAIDs & Opioids

Q1. NSAIDs produce analgesia by inhibiting:
A. Sodium channels
B. Cyclo-oxygenase (COX)
C. Acetylcholinesterase
D. GABA
Show Answer
✅ Answer: B
NSAIDs inhibit COX, reducing prostaglandin synthesis.
Q2. The safest analgesic in pregnancy is generally:
A. Aspirin
B. Ibuprofen
C. Paracetamol
D. Diclofenac
Show Answer
✅ Answer: C
Paracetamol is preferred in pregnancy at therapeutic doses.
Q3. A COX-2 selective NSAID is:
A. Ibuprofen
B. Celecoxib
C. Naproxen
D. Aspirin
Show Answer
✅ Answer: B
Celecoxib selectively inhibits COX-2.
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Antibiotics in DentistryDrug Interactions in DentistryLocal Anesthetics — Pharmacology