Khan has not been seen in public since he was jailed for three years in August for unlawfully selling state gifts during his tenure in office
The Pakistani rupee weakened 1.3% to a new record low of 288.5 against the US dollar on Wednesday, a day after former prime minister Imran Khan was arrested by the anti-corruption agency in Islamabad.
Following the arrest, clashes erupted between Khan supporters and police, leaving at least one protester dead. The interior ministry has suspended mobile broadband services in the country.