[…] digitalis toxicity that affect the central nervous system include: drowsiness, lethargy, fatigue, neuralgia, headache, dizziness, seizures, hallucinations, confusion or giddiness
[symptoma.com]
CNS symptoms of digitalis toxicity include the following: Drowsiness Lethargy Fatigue Neuralgia Headache Dizziness Confusion or giddiness Hallucinations Seizures (rare) Paresthesias
[emedicine.medscape.com]
With an acute ingestion, symptoms such as nausea, vertigo, and vomiting are prominent. On the other hand, nonspecific symptoms are predominant in chronic toxicity.
[en.wikipedia.org]