Adverse reactions include decreased appetite, vomiting, insomnia, nausea, dizziness, somnolence, and headache. Symptoms of overdose include central nervous system depression, confusion, dizziness, ataxia, and somnolence. Neurological signs - visual changes, headache, dizziness, tinnitus, gait instability, confusion, somnolence, coma. Rare reports have been made of ranitidine causing malaise, dizziness, somnolence, insomnia, and vertigo. Mental fatigue can manifest as somnolence, lethargy, or directed attention fatigue. Common side effects of amifostine include hypocalcemia, diarrhea, nausea, vomiting, sneezing, somnolence, and hiccoughs. Agonists produce significant, although mild, side effects including somnolence, hallucinations, insomnia, nausea, and constipation. Side effects of the medication include dry mouth, sleepiness, somnolence, flushing and loss of consciousness. Side effects include headache, agitated emergence, prolonged somnolence, and nausea. Acute overdosage may be manifested by somnolence, tachycardia and hypertonicity. It can manifest as somnolence, lethargy, or directed attention fatigue. It produced side effects such as headache, somnolence and nausea. Dravet syndrome is also associated with sleep disorders including somnolence and insomnia. Fatigue is generally considered a more long-term condition than sleepiness (somnolence). Common initial symptoms include confusion, somnolence, generalized seizures, headaches, and vision impairment.