Sudden inability to speak, marked weakness and reduced responsiveness is a medical emergency and may represent stroke, seizure, low
sugar or another serious condition.
Call an ambulance and take him to the nearest emergency department immediately; do not wait for an online consultation.
Note the exact time he was last normal, keep him on his side if drowsy, and do not give food, drink or tablets by mouth.
Urgent examination, glucose testing and brain imaging are required because stroke treatment is time-sensitive.