These are lists of investigational drugs:
- List of investigational acne drugs
- List of investigational aggression drugs
- List of investigational agitation drugs
- List of investigational analgesics
- List of investigational antidepressants
- List of investigational antipsychotics
- List of investigational anxiety disorder drugs
- List of investigational attention deficit hyperactivity disorder drugs
- List of investigational autism and pervasive developmental disorder drugs
- List of investigational bipolar disorder drugs
- List of investigational borderline personality disorder drugs
- List of investigational chronobiotics
- List of investigational cognition and memory disorder drugs
- List of investigational eating disorder drugs
- List of investigational fatigue drugs
- List of investigational fibromyalgia drugs
- List of investigational generalized anxiety disorder drugs
- List of investigational hair loss drugs
- List of investigational hallucinogens and entactogens
- List of investigational headache and migraine drugs
- List of investigational insomnia drugs
- List of investigational long COVID drugs
- List of investigational ME/CFS drugs
- List of investigational narcolepsy and hypersomnia drugs
- List of investigational obsessive–compulsive disorder drugs
- List of investigational orthostatic intolerance drugs
- List of investigational other psychiatric disorder drugs
- List of investigational panic disorder drugs
- List of investigational Parkinson's disease drugs
- List of investigational PMS/PMDD drugs
- List of investigational post-traumatic stress disorder drugs
- List of investigational restless legs syndrome drugs
- List of investigational sex-hormonal agents
- List of investigational sexual dysfunction drugs
- List of investigational sleep apnea drugs
- List of investigational social anxiety disorder drugs
- List of investigational substance-related disorder drugs
- List of investigational tinnitus drugs
- List of investigational Tourette's syndrome drugs