H1RO	Brain H1 receptor occupancy
GPCR	G-protein-coupled receptors
PIR	proportional impairment ratio
CONGA	Consensus Group of New Generation of Antihistamines
BBB	blood–brain barrier
pKa	Acid–Base Dissociation Constant
T max	time to maximum plasma concentration
t½	elimination half-life
ARIA	Allergic Rhinitis and its Impact on Asthma
SAR	seasonal allergic rhinitis
TSS	total symptom score
NSS	nasal symptom score
NNSS	non-nasal symptom score
PAR	perennial allergic rhinitis
FMT	Fine Motoric Test
CFF	Critical Flicker-Fusion Frequency Test
D2T	“d2” Cancellation Test
SRT	Simple Reaction Time
SDLP	standard deviations of lateral position