Mj. Shelton et al., If taken 1 hour before indinavir (IDV), didanosine does not affect IDV exposure, despite persistent buffering effects, ANTIM AG CH, 45(1), 2001, pp. 298-300
Concurrent administration of indinavir and didanosine significantly reduces
the level of exposure to indinavir, but it is unclear how soon after didan
osine administration indinavir may be given safely. We compared indinavir p
harmacokinetics and gastric pH in 12 human immunodeficiency virus-positive
patients by use of 800 mg of indinavir alone versus 800 mg of indinavir adm
inistered 1 h after didanosine administration. Median gastric pH was signif
icantly higher when indinavir was taken after didanosine administration; ho
wever, no significant difference in the maximum concentration in plasma or
the area under the concentration-time curve from time zero to 8 h was obser
ved. Indinavir may be taken with a light meal 1 h following the administrat
ion of 400 mg of didanosine.