Reason for modification Overall d4T in regimen AZT in regimen
Drug Contraindication, IR (95% CI) 10.3 per 100py (6.9-15.4) 10 per 100py
(5.6-18.1)
10.6 per 100py (6.1-18.2)
  TB treatment 18 6 12
  Pregnancy 6 5 1
Toxicity / Side-effects, IR (95% CI) 5.9 per 100py (4.8-7.3) 5.1 per 100py
(4-6.5)
11 per 100py (7.2-16.7)
  Peripheral neuropathy 29 29 0
  Lipodystrophy / lipoatrophy 27 26 1
  Anaemia 6 0 6
  Hypersensitivity rash 9 2 7
  Hepatitis / raised transaminases 8 3 5
  Lactic acidosis 3 3 0
  Vomiting 2 0 2
  Myalgia 1 0 1
Treatment failure, IR (95% CI) 4.9 per 100py (1.2-19.5) 4.9 per 100py
(1.2-19.5)
-
  Treatment failure 2 2 0
Other reasons, IR (95% CI) 53.3 per 100py (13.3-213.3) 53.3 per 100py (13.3-213.3) -
  Drug shortage 2 2 0
Total, IR (95% CI) 1 per 100py (0.8-1.2) 1.2 per 100py
(0.9-1.5)
0.7 per 100py (0.5-1)
Total 113 78 35
TB–tuberculosis; IR – Incidence rate; 95% CI – 95% Confidence interval; py – person years; d4T – Stavudine; AZT- Zidovudine. Totals for Drug contraindication (n=24, 21.2%); Toxicity (n=85, 75.2%); Treatment failure (n=2, 1.8%); Other reasons (n=2, 1.8%).
Table 4: Reasons for antiretroviral treatment modification among the 578 on Nevirapine based regimens patients initiating first-line antiretroviral therapy at the Mbabane Government Hospital in Swaziland between 01 March 2006 and 31 March 2008.
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