He was speaking to reporters outside the Parliament House in Islamabad on Monday.
Shah said Information Minister Pervez Rashid’s statement that the government would not hold talks with PTI was disappointing.
It was necessary for the PML-N led government to hold talks with Pakistan Tehreek-i-Insaf, the Pakistan Peoples Party leader said, adding that in the other case, the government risked weakening its own standing.
He also said that the actions of both the Pakistan Muslim League – Nawaz government and Imran Khan were destabilising the country.
Today’s was the first reaction by the opposition leader on Imran Khan’s call of paralysing cities to increase pressure on the PML-N government.
Imran’s announcement calls for paralysing major cities in the first phase and eventually shutting down the entire country by Dec 16.
“On Thursday (Dec 4), I will go to Lahore and shut it down. On Dec 8 I will shut down Faisalabad; on Dec 12, I will go to Karachi and shut it down. By Dec 16, I will close down all of Pakistan,” Imran had said.