Raymond "Red" Reddington is a fictional character from the television series "The Blacklist." He is portrayed by actor James Spader. At that time, there were no indications or storylines suggesting that Raymond Reddington was experiencing hallucinations on the show.
However, it's worth noting that television series can evolve over time, and new plotlines or developments may have been introduced in later seasons or episodes. If there have been new episodes or storylines released after 2023, I would not be aware of them.
To get the most up-to-date information on the character and any potential developments in the storyline, I recommend checking the latest episodes or official sources related to "The Blacklist."