polydipsiadrinking too much water

What the Word

What the word

drinking too much water

polydipsia (medical term)

hyponatremia (dilutional, severe)

water intoxication (acute case)

overhydration (general)

potomania (psychiatric)

Synonym

polydipsia

symptom

excessive thirst (plain)

condition

diabetes insipidus (differential) diabetes mellitus (differential) hypercalcemia (cause)

polyuria (companion) thirst (plain)

Thesaurus

polydipsia

Types

psychogenic polydipsia (primary) dipsogenic polydipsia secondary polydipsia compulsive water drinking potomania

Causes

diabetes mellitus diabetes insipidus hypercalcemia hypokalemia lithium (drug‑induced) antipsychotics diuretics SIADH (context) hypothalamic lesion psychogenic origin

Mechanism

thirst osmoreceptors hypothalamic thirst center ADH (suppressed) vasopressin aquaporins dilute urine serum osmolality (low) hyponatremia

Signs

polyuria excessive thirst nocturia water intoxication weight gain (water) clear urine

Consequences

hyponatremia cerebral edema seizures confusion coma water intoxication death (severe)

Measurement

water deprivation test serum sodium urine osmolality plasma osmolality 24‑hour intake

Clinical settings

psychiatry schizophrenia bipolar disorder developmental disability intensive care endocrinology

Related terms

polyuria polydipsia‑polyuria syndrome primary polydipsia thirst disorder hyperdipsia adipsia (opposite) oligodipsia (opposite)

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Chapter 3 — Edited

BaskervilleRegular17BIU

Chapter 3

The storm had passed around six. Claire opened the kitchen window and stood there, one hand on the still-cold glass.

A smell rose from the garden, one she had known since childhood: the smell of earth after rain. There was a word for it, she was sure of it:

What the Word

the smell of the earth after rain

petrichor

geosmin (chemical compound)

earthiness (general term)

after-rain scent (descriptive)

mud smell (literal)

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