The Short Version
The listed symptoms — headache, vomiting, blurred vision, and decreased level of consciousness — are all well-documented clinical presentations of increased intracranial pressure, confirmed across peer-reviewed literature, major clinical references, and leading medical institutions. The word "including" accurately frames these as recognized symptoms without implying they appear uniformly in every case. One nuance: decreased consciousness is more characteristic of severe or worsening ICP rather than an early presenting feature in all patients.