This can cause nausea and vomiting, vertigo, headaches, lethargy, and overall malaise. Symptoms of SAS include nausea and vomiting, vertigo, headaches, lethargy, and overall malaise. Common symptoms in concussed children include restlessness, lethargy, and irritability. Mental fatigue can manifest as somnolence, lethargy, or directed attention fatigue. This fluid build up is associated with an enlarged head, vomiting, lethargy, headaches, and irritability. Young children having ingested acute overdoses of amoxicillin manifested lethargy, vomiting, and renal dysfunction. Subtle symptoms include poor feeding, either bottle or breast, lethargy, and irritability. Insufficient hydration may cause lethargy, soreness or muscle cramps. It can manifest as somnolence, lethargy, or directed attention fatigue. Possible side effects include insatiable hunger, aches, insomnia/oversleeping, lethargy, and persistent runny nose. This failure to improve Mrs. Bennet's behavior lead to his lethargy and apathy indolence. The most frequently reported symptoms were lethargy or fatigue, joint pain, and hair loss. Clinical signs include lethargy, anorexia, weight loss, and jaundice. Acute overdosage is often manifested by emesis, lethargy, ataxia, tachycardia and seizures. Acute overdosage is often manifested by emesis, lethargy, ataxia, tachycardia, and seizures.