AIDS	Acquired immunodeficiency syndrome
WHO	World Health Organization
UNAIDS	The Joint United Nations Program on HIV/AIDS
HIV	Human immunodeficiency virus
HAART	Highly active antiretroviral therapy
ARV	Antiretroviral
CNS	Central nervous system
BBB	Blood–brain barrier
P-gp	P-glycoprotein
NLC	Nanostructured lipid carriers
ATZ	Atazanavir
SLN	Solid lipid nanoparticle
SNEDDS	Self-nanoemulsifying drug delivery system
SLB	Solid–liquid binary lipid
QbD	Quality by Design
BBD	Box–Behnken design
RSM	Response surface methodology
PDI	Polydispersity index
ZP	Zeta potential
EE	Entrapment efficiency
LC	Loading capacity
TEM	Transmission electron microscopy
DSC	Differential scanning calorimetry
PBS	Phosphate buffer saline
HPLC	High performance liquid chromatographic method
CLSM	Confocal laser scanning microscopy
MTT	Methylthiazoletetrazolium
H&E	Hematoxylin and eosin
CV	Cresyl violet
ANOVA	Analysis of variance (ANOVA
GRAS	Generally recognized as safe
HLB	Hydrophilic–lipophilic balance