The evidence is strongest for depression, irritable bowel syndrome and insomnia.
From the guardian.co.uk
They become edgy and irritable without the pinch of snuff between cheek and gum.
From the usatoday.com
I can't seem to finish any projects I start anymore and I'm much more irritable.
From the blogs.psychcentral.com
Hunger makes him irritable and his language is terrible if the service is slow.
From the telegraph.co.uk
Food allergies normally cause irritable bowl syndrome and other digestive issues.
From the ocregister.com
Cedars-Sinai holds a patent on the use of rifaximin for irritable bowel syndrome.
From the washingtonpost.com
The children were then tired, irritable, and restless during the following day.
From the sciencedaily.com
Frey leads yoga for a clinical study on patients with irritable bowel syndrome.
From the newsobserver.com
In recent days, McCain has appeared irritable in interviews and at the Capitol.
From the denverpost.com
More examples
Cranky: easily irritated or annoyed; "an incorrigibly fractious young man"; "not the least nettlesome of his countrymen"
Abnormally sensitive to a stimulus
Excitable: capable of responding to stimuli
(irritability) an irritable petulant feeling
(irritability) excitability: excessive sensitivity of an organ or body part
(irritability) temper: a disposition to exhibit uncontrolled anger; "his temper was well known to all his employees"
(irritably) testily: in a petulant manner; "he said testily; `Go away!'"
Irritation or exacerbation, in biology and physiology, is a state of inflammation or painful reaction to allergy or cell-lining damage. A stimulus or agent which induces the state of irritation is an irritant. ...
Irritability is an excessive response to stimuli. The term is used for both the physiological reaction to stimuli and for the pathological, abnormal or excessive sensitivity to stimuli; It is usually used to refer to anger or frustration.