Olisa Metuh, former spokesman of the Peoples Democratic Party (PDP), collapsed at a federal high court in Abuja on Monday morning.
He was making his way to the dock for his resumed trial when he fell down.
Okon Abang, the presiding judge, had to stand down the matter to enable the former PDP spokesman receive medical attention.
Metuh is standing trial for alleged money laundering of N400million being part of the funds linked to Sambo Dasuki, former national security adviser.