5-HT	5-hydroxytryptamine (serotonin)
ADRs	adverse drug reactions
AMPA	α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (glutamate receptors)
BDNF	brain derived neurotrophic factor
CNS	central nervous system
COX-2	cyclooxygenase 2
GABA	gamma aminobutyric acid
HPA	hypothalamic-pituitary-axis
SSRIs	selective serotonin reuptake inhibitors
Il	interleukin
INF-γ	interferon-γ
iNOS	inducible nitric oxide synthase
MAH	marketing authorization holder
MAOIs	monoamine oxidase inhibitors
MDD	major depressive disorder
NDRIs	noradrenaline and dopamine reuptake inhibitors
NE	noradrenaline (norepinephrine)
NF-κB	nuclear factor-kappa factor
NMDA	N-methyl-D-aspartate (glutamate receptors)
NRIs	noradrenaline reuptake inhibitors
OTC	over the counter (drugs)
OS	oxidative stress
SNRIs	selective noradrenaline reuptake inhibitors
SJW	St. John’s wort
TCAs	tricyclic antidepressants
TNF-α	tumour necrosis alpha
WHO	World Health Organization