Koirala, top leader of the seven-party coalition fighting against the King's direct rule, will have his heart check-up at the Apollo Hospital in New Delhi.
Former Nepalese prime minister Girija Prasad Koirala said India should not resume arms supply to Nepal at a time when political parties have joined ranks to fight for restoration of democracy.
K P Sharma Oli was elected as the next prime minister of Nepal on Sunday defeating incumbent Sushil Koirala in a contest which became necessary after parties failed to forge a consensus amid violent protests over the country's new Constitution.
Deuba was elected as the 40th prime minister on June 6 with the support from Communist Party of Nepal-Maoist Centre, which is now a part of Left alliance and opting for merger with Communist Party of Nepal-Unified Marxist-Leninist.
The 70-year-old was the only contender in the election.
The Shiv Sena on Monday refused to call off the protest against the book launch of former Pakistan Foreign Minister Khurshid Mahmud Kasuri in Mumbai.