Pharmacology All are true about cephalosporins, except: A Ceftazidime is a 3rd generation cephalosporin. B Cefoperazone has got antipseudomonal effect. C Cefoxitin has got no activity against anaerobes. D Cephalosporins act by inhibiting cell wall synthesis. 💡 Explanation All are true about cephalosporins, except: ✓ Correct Answer: C. Cefoxitin has got no activity against anaerobes.