The most frequent adverse events leading to discontinuation were somnolence, dizziness, nausea, fatigue, headache, and insomnia.
en.wikipedia.org The typical initial symptoms of a child with hyperammonemia are non-specific: failure to feed, loss of thermoregulation with a low core temperature, and somnolence.
en.wikipedia.org She was then in a somnolence and did not react to external impulses.
en.wikipedia.org Possible side effects include abdominal pain, allergy, diarrhea, headache, hepatic dysfunction/hepatitis, nausea or vomiting, exacerbation of porphyries, pruritis, rash, somnolence, vertigo, or dizziness.
en.wikipedia.org Alterations in consciousness may follow several hours later, which include impaired judgement and memory, confusion, somnolence and stupor.
en.wikipedia.org