This is a list of investigational social anxiety disorder drugs, or drugs that are currently under development for clinical use in the treatment of social anxiety disorder (SAD; or social phobia) but are not yet approved.
Chemical/generic names are listed first, with developmental code names, synonyms, and brand names in parentheses.
This list was last comprehensively updated in August 2024. It is likely to become outdated with time.
An anxiolytic is a medication or other intervention that reduces anxiety. This effect is in contrast to anxiogenic agents which increase anxiety. Anxiolytic medications are used for the treatment of anxiety disorders and their related psychological and physical symptoms.
Venlafaxine, sold under the brand name Effexor among others, is an antidepressant medication of the serotonin–norepinephrine reuptake inhibitor (SNRI) class. It is used to treat major depressive disorder, generalized anxiety disorder, panic disorder, and social anxiety disorder. Studies have shown that venlafaxine improves post-traumatic stress disorder (PTSD). It may also be used for chronic neuropathic pain. It is taken orally. It is also available as the salt venlafaxine besylate in an extended-release formulation.
EX-597 is a fatty acid amide hydrolase inhibitor which is under development for the treatment of social anxiety disorder and post-traumatic stress disorder (PTSD).
A serotonin receptor agonist is an agonist of one or more serotonin receptors. They activate serotonin receptors in a manner similar to that of serotonin, a neurotransmitter and hormone and the endogenous ligand of the serotonin receptors.
The orexin receptor (also referred to as the hypocretin receptor) is a G-protein-coupled receptor that binds the neuropeptide orexin. There are two variants, OX1 and OX2, each encoded by a different gene (HCRTR1, HCRTR2).
Vortioxetine, sold under the brand name Trintellix and Brintellix among others, is an antidepressant of the serotonin modulator and stimulator (SMS) class. Its effectiveness is viewed as similar to that of other antidepressants. It is taken orally.
TGBA01AD (also known as FKB01MD) is a serotonin reuptake inhibitor, 5-HT1A and 5-HT1D receptor agonist, and 5-HT2 receptor antagonist which is under development by Fabre-Kramer for the treatment of major depressive disorder. It has been in phase II clinical trials since 2009, and as of January 2016, remains in this phase of development.
Aripiprazole/sertraline is a combination formulation of aripiprazole (Abilify), an atypical antipsychotic, and sertraline (Zoloft), a selective serotonin reuptake inhibitor (SSRI), which was under development by Otsuka Pharmaceutical for the treatment of major depressive disorder (MDD). It combines serotonin reuptake inhibition from sertraline and modulation of dopamine and serotonin receptors from aripiprazole. In July 2017, it was in preregistration in Japan for the treatment of MDD. However, in September 2018, the regulatory submission in Japan for MDD was withdrawn.
Hypidone (developmental code name YL-0919) is an investigational serotonergic antidepressant which is under development for the treatment of major depressive disorder. It acts as a serotonin reuptake inhibitor, 5-HT1A receptor partial agonist, and 5-HT6 receptor full agonist. It is used as the hydrochloride salt. As of January 2021, hypidone is in phase 2 clinical trials for major depressive disorder.
The role of the ECS specifically in social anxiety is supported by various preclinical findings which demonstrate effects of ECS modulation, via either CB1 receptor activation or FAAH inhibition, on social interaction and social anxiety.113-118 In comparison, clinical studies investigating this system in SAD are considerably limited. A recent clinical trial investigating the therapeutic effects of a FAAH inhibitor in SAD was negative. However, the authors observed a small to modest anxiolytic effect in patients with severe SAD and suggested that, based on the correlation between low trough concentrations of the inhibitor (i.e., the lowest concentration of the drug in the bloodstream) and low plasma AEA, future trials with a higher dose of the inhibitor may be warranted.119 In addition, a recently published double-blind, placebocontrolled experimental study in healthy adults found that administration of the FAAH inhibitor PF-04457845 produced a 10-fold increase in peripheral AEA levels and decreased broad-spectrum fear-related phenotypes.120 Furthermore, a 2021 double-blind, placebo-controlled clinical trial in healthy males employing the FAAH inhibitor JNJ-42165279 found that the drug attenuated activation in the amygdala, anterior cingulate, and bilateral insula during a face emotion processing task – effects which are consistent with those of previously observed anxiolytic agents.121 Moreover, higher levels of plasma AEA were associated with greater attenuation in these brain regions.121
For instance, Paulus and coworkers found that JNJ-42165279 (100 mg) dampens amygdala activity during an emotion face-processing task, an effect that is associated positively with plasma AEA concentrations (Paulus et al., 2021). A lower dose of the drug (25 mg) was tested in a multicenter, placebo-controlled phase 2 trial in patients with social anxiety disorder. The study reported statistically detectable signs of efficacy, but the dosage was considered insufficient to fully inhibit FAAH (Schmidt et al., 2021).
The SNRI venlafaxine has also been shown to be safe, well- tolerated and more effective than placebo in the short-term treatment of generalized SAD. Paroxetine, sertraline and venla- faxine are currently the only US FDA approved medications for treating SAD, with escitalopram and moclobemide also licensed for use in Europe. MAOIs, in the form of phenelzine, and certain benzodiazepines are also effective in SAD, but in view of concerns about ease of administration (e.g., MAOIs require dietary and medication restrictions) and side effects (e.g., benzodiazepines are associated with cognitive adverse events and require slow withdrawal), its seems reasonable to view these as second-line agents.
Moclobemide, approved in Europe for the treatment of social phobia/social anxiety disorder, and other reversible inhibitors of MAO-A arise as a promising family of drugs for the treatment of these disorders.
In a retrospective analysis of a case series, the monotherapy with extended-release methylphenidate was seen to be effective in reducing ADHD and social AD symptoms evaluated by the Adult ADHD Self-Report Scale (ASRS) and Liebowitz Social Anxiety Scale (LSAS) (Koyuncu et al., 2017).
Attention-deficit/hyperactivity disorder (ADHD), another childhood disorder that extends over adulthood, is an overlooked condition that has high rates of comorbidity with SAD.31 Only recently increasing evidence suggests that the relationship between the two disorders is closer than that was thought before. Several studies found high rates (up to 60–70%) of childhood ADHD comorbidity, especially predominantly inattentive type, in adults with SAD.67,157,158 In addition, follow-up studies showed that the lifetime prevalence of SAD among ADHD patients is higher compared to healthy controls.159 In treatment studies investigating patients with SAD plus ADHD comorbidity found that ADHD medications such as methylphenidate or atomoxetine could effectively improve symptoms of both disorders at the same time.160–163 According to a developmental hypothesis, SAD may be etiologically linked to ADHD in a subgroup of patients, and thus SAD may develop secondary to ADHD.31