Final answer:
Drowsiness or coma, slurred speech, impairment in attention or memory are all signs or symptoms of: neurological disorders or substance abuse.
Step-by-step explanation:
Drowsiness, slurred speech, and impairment in attention or memory can be signs or symptoms of neurological disorders or substance abuse.
These symptoms can be indicative of various conditions, but in the context of the provided information, they are most likely related to neurological disorders or substance abuse.
Neurological conditions such as strokes, traumatic brain injuries, or tumors can cause drowsiness, slurred speech, and impaired cognitive function.
Substance abuse, particularly alcohol or drug overdose, can also lead to these symptoms.