Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0023380 (lethargy)
 5,697 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Twenty percent of a cohort of 206 outpatient depressives with no past bipolar history switched during prospective observation. These 41 probands developed manic periods on the average of 6.4 years (median 4, range 1-25) after their first depressive episode. The change in polarity occurred throughout the life span, but was most common in adolescence and early adulthood. The following variables were found useful in predicting this outcome: onset less than or equal to 25 years, bipolar family history, loaded pedigrees, precipitation by childbirth, hypersomnic-retarded phenomenology, and pharmacologically-mobilized hypomania. Although the respective sensitivities of these findings were relatively low (32-71%), their specificities ranged from 69% to 100% for bipolar outcome; the diagnostic specificity of any 3 of these variables when combined was 98%. When compared with nonbipolar depression, bipolar disorder was seldom chronologically secondary to nonaffective psychiatric disorders. These findings suggest that many young depressives with lethargy and oversleeping are not manifesting a "neurotic" disorder, but rather a precursor of primary bipolar affective disorder. Finally, a psychotically depressed adolescent or young adult with positive bipolar family history should be observed for eventual bipolar outcome, especially when the clinical presentation is that of stupor.
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PMID:Bipolar outcome in the course of depressive illness. Phenomenologic, familial, and pharmacologic predictors. 622 91

The purpose of this study is to determine the stability of symptoms of hypomania and depression across repeated affective episodes in patients with rapid-cycling bipolar disorder. Nine patients had a total of 30 depressive episodes and 31 hypomanic episodes during the period of observation. Standardized observer ratings indicated that the three symptoms most consistently reported during depressive episodes were fatiguability, decreased work activities and hypersomnia. These results as well as those from the standardized observer ratings of hypomania indicate that depression in this population consists of a lethargic, hypoactive state while hypomania may be a heightened state of activation. The clinical and theoretical implications of these findings are discussed.
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PMID:The reproducibility of depressive and hypomanic symptoms across repeated episodes in patients with rapid-cycling bipolar disorder. 775 65

The typical symptoms of recurrent winter depression include lowered mood, lethargy, hypersomnia, social withdrawal, decreased libido, increased appetite and weight gain. Mild hypomania often occurs in spring and summer. It is argued that this pattern of attenuated hibernation constituted an adaptive evolutionary mechanism which enhanced the likelihood of reproductive success, most notably for females, among populations living at temperate latitudes. Women were more likely to become pregnant in the summer and thus to give birth at a time of year when their babies had a higher chance of survival. Winter depression symptoms also promoted healthier pregnancies and gave rise to enhanced female-male pair-bonding which improved the survival chances of both mothers and babies. Hypomania in spring and summer also served to increase the likelihood of procreation at the optimal time of year. In the modern era, it is probable that recurrent winter depression is becoming a reproductive disadvantage.
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PMID:Seasonal affective disorder: a vestigial evolutionary advantage? 1548 44

The biology of natural selection is an enduring mystery, as is the nature of Charles Darwin's chronic illness. Of the theories advanced to explain the latter, Oedipal conflicts and Chagas' disease are preeminent. Hypomania, however, propelled Darwin to the pinnacle of scientific achievement and good health, the depression that followed condemning him to intellectual stagnation, lethargy, impaired memory and concentration, and incapacitating gastrointestinal disorders. Examples of natural selection in humans are much sought after when, ironically, one need look no further than Darwin himself.
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PMID:The paradoxical advantages and disadvantages of natural selection: the case history of Charles Darwin. 1749 50

Understanding the particular pharmacology of different antidepressant drugs can help explain their adverse effects when they are discontinued. For all antidepressant drugs, abruptly stopping them can sometimes result in "rebound" hypomania or mania. Antidepressant drugs having anticholinergic effects often are associated with a discontinuation syndrome characterized by cholinergic rebound, with symptoms of nausea, vomiting, abdominal cramping, sweating, headache, and muscle spasms. Discontinuation of monoamine oxidase inhibitor drugs sometimes results in flu-like symptoms, dysphoria, restlessness, tachycardia, hypertension, and a delirium-like state. Serotonergic antidepressant drugs are sometimes associated with a distinct discontinuation syndrome characterized by dizziness, weakness, nausea, headache, lethargy, insomnia, anxiety, poor concentration, and paresthesias. Adverse discontinuation effects can occur with all types of antidepressant drugs, but only rarely would they be considered serious. To minimize adverse discontinuation effects and to reduce the risk of relapse or recurrence of the underlying treated condition, tapering antidepressant medication is prudent for all patients.
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PMID:Potential adverse effects of discontinuing psychotropic drugs: part 2: antidepressant drugs. 2060 81