Those Indicating Need for Medical Attention:
Incidence Less Frequent: Dysarthia (trouble in speaking), dyspnea (trouble in breathing), extrapyramidal symptoms, pakinsonian (trouble in speaking or swallowing, loss of balance control, mask-like face, shuffling walk, slowed movements, stiffness of arms or legs, trembling and shaking of hands and fingers), flu-like symptoms (fever, chills, muscle aches), leukopenia (fever, chills, or sore throat), orthostatic hypotension (dizziness, lightheadedness, or fainting, especially when getting up from a lying or sitting position), peripheral edema (swelling of feet or lower legs), skin rash.
Incidence Rare: Changes in lenses of eyes- usually asymptomatic, galactorrhea (unusual secretion of milk)- in females, hypothyroidism (loss of appetite, weight gain, dry and puffy skin, tiredness), hypotension, menstrual changes, neuroleptic malignant syndrome (NMS) (difficult or unusually fast breathing, fast heartbeat or irregular pulse, high fever, high or low [irregular] blood pressure, increased sweating, loss of bladder control, severe muscle stiffness, seizures, unusual pale skin, unusual tiredness or weakness), seizures, tachycardia (fast, pounding or irregular heartbeat; fainting)
Note: Changes in the lenses of the eyes have been observed in patients during long-term quetiapine therapy and cataracts have developed in dogs during chronic quetiapine dosing. Regular ophthalmologic examinations are recommended during quetiapine therapy.
Those Indicating Need for Medical Attention Only if Continuous or are Bothersome:
Incidence More Frequent: Constipation, dizziness, drowsiness, dry mouth, dyspepsia (indigestion), increased weight.
Note: Dyspepsia and increased weight are dose-related. In pooled data from 3- to 6-week trials, 23% of patients receiving quetiapine and 6% of patients receiving placebo gained ≥ 7% of their baseline body weight.
Incidence Less Frequent: Abdominal pain, abnormal vision, anorexia (decreased appetite), asthenia (decreased strength and energy), headache, hypertonia (increased muscle tone), increased sweating, palpitation (feeling of fast or irregular heartbeat), pharyngitis (sore throat), rhinitis (stuffy or runny nose).
Note: Abdominal pain is dose-related.