Its possible side effects include dizziness, dry mouth, fatigue, irritability and nausea.

They can include irritability, headache, fever and sometimes itching at the site of the bite.

Signs of depression in men may include irritability, anger, or drug and alcohol abuse.

Her symptoms, before medication, included irritability, too much energy and insomnia.

Other possible side effects include drowsiness, poor concentration, and irritability.

Other symptoms may include irritability, weight loss, and mouth ulcers.

The drug's side effects, which can include anemia, irritability and insomnia, are relatively mild.

Caffeine-like side effects may include irritability, restlessness and learning disabilities.

Other signs of menopause include night sweats, sleep difficulties, and irritability.

Withdrawal symptoms that may follow occasional use include mild depression and irritability.