The mnemonic
Lithium's four T's
What each word stands for
- TTremor
- TThirst and polyuria (nephrogenic diabetes insipidus)
- TThyroid (hypothyroidism)
- TTeratogenicity (Ebstein's anomaly)
Why it matters clinically
Guides counselling and monitoring of levels, renal and thyroid function.
Where it stops being reliable
Leaves out weight gain, leucocytosis and toxicity features such as coarse tremor and ataxia.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.