Yes, you can take Red Monkey with a pre-workout but I would recommend not taking Red Monkey with a pre-workout.
The driving force behind Red Monkey is that it can help with reducing social anxiety and can help with up-lifting your mood. As such, it has a lot of natural compounds in it that are meant to help you be more relaxed.
A pre-workout on the other hand is not meant to help you be relaxed, it's meant to help you get in the zone and go hard in the gym. Taking a product such as Red-PCT with a pre-workout would be better than taking Red Monkey with it.