Although most thyroxine ingestions are mild, large acute or chronic ingestions can mirror moderate to severe thyrotoxicosis
Often marked (40 - 41C)
Often out of proportion to fever 
May also have:
CHF
Palpitations
Dyspnea
Widened pulse pressure
A-fib
Hyperhidrosis
Thyrotoxic stare, lid retraction
Goitre
Tremor
Hepatomegaly
Jaundice
CHF
Palpitations
Dyspnea
Widened pulse pressure
A-fib
Hyperhidrosis
Thyrotoxic stare, lid retraction
Goitre
Tremor
Hepatomegaly
Jaundice
Levothyroxine toxicity
Sympathomimetic ingestion
Congenital adrenal hyperplasia
Atherosclerosis
Gamma hydroxybutyrate withdrawal
Aortic regurgitation
Hypothyroidism
Thyrotoxicosis