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Table 4 Pharmacokinetic parameters of amodiaquine and desethylamodiaquine (median, IQR) following artesunate-amodiaquine fixed-dose combination treatment of Ghanaian patients with uncomplicated P. falciparum malaria, by age category

From: Pharmacokinetic profile of amodiaquine and its active metabolite desethylamodiaquine in Ghanaian patients with uncomplicated falciparum malaria

Parameter Age category (years) p-value
All ages  < 1 1–4  ≥ 5
n = 223 n = 9 n = 125 n = 89
Amodiaquine
 AUC0-∞ (ng h /ml) 1318 (583–3549) 4201 (2773–17,909) 1994 (642–5199) 875 (400–1,434)  < 0.001
 Cmax (ng/ml) 18.8 (9.8–50.7) 49.6 (21.7–107.0) 27.7 (14.7–70.0) 11.6 (6.7–18.8)  < 0.001
 Tmax (days) 2 (1–3) 1 (1–2) 2 (1–3) 2 (1–3) 0.71
 Cl/F (L kg−1 h−1) 25.9 (8.6–56.0) 6.7 (1.4–11.2) 15.7 (7.0–47.1) 39.6 (18.7–76.9)  < 0.001
 Vd/F (L kg−1) 1,195 (416–2,735) 325 (98–1141) 859 (359–2,613) 1,840 (861–3,656) 0.008
 t½ (hours) 47.4 (32.4–72.8) 54.1 (24.6–148.7) 48.8 (32.6–87.9) 41.7 (32.4–56.1) 0.24
  n = 227 n = 9 n = 127 n = 91  
Desethylamodiaquine
 AUC0-∞ (ng h /ml) 116,100 (70,325–203,110) 163,020 (94,262–255,562) 124,508 (79,736–225,582) 105,596 (56,986–159,382) 0.057
 Cmax (ng/ml) 565 (349–827) 365 (266–665) 604 (377–937) 528 (260–720) 0.046
 Tmax (days) 3 (2–3) 2 (2–3) 3 (2–3) 3 (2–3) 0.33
 Cl/F(L kg−1 h−1) 0.26 (0.16–0.46) 0.19 (0.11–0.31) 0.24 (0.16–0.41) 0.31 (0.16–0.56) 0.071
 Vd/F (L kg−1) 67.5 (43.0–126.8) 57.0 (40.1–100.5) 62.3 (42.9–124.6) 72.9 (45.3–150.2) 0.49
 t ½ (hours) 196.4 (152.8–276.1) 237.8 (204.6–280.3) 187.6 (155.1–276.1) 200.1 (137.5–268.6) 0.60
  1. IQR Interquartile range, AUC0-∞ Area under the concentration versus time curve from time zero to infinity, ng.h /ml nanogram hour per milliliter, Cmax = Observed maximum concentration, ng/ml nanogram per milliliter, Tmax time to maximum concentration, CL/f apparent clearance, Vd/f apparent volume of distribution, t½ = elimination half-life
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