Oral solid self-nanoemulsifying drug delivery systems of candesartan citexetil: formulation, characterization and in vitro drug release studies

AAPS Open

Table 2 Visual observation of self- nanoemulsification grades

Grade	Time required for nanoemulsion formation	Appearance
A	Within 1 min	Clear or slightly bluish
B	Within 1 min	Bluish white
C	Within 2 min	Bluish white, similar in appearance to milk
D	Longer than 2 min	Dull, ash emulsion, slightly oily appearance
E	Longer than 2 min	Poor or minimal emulsification, large oil droplets present on the surface