Recep Tayyip Erdogan, the Turkish prime minister, was released from hospital on Tuesday. He had been admitted after collapsing while on his way to make a speech in parliament.

It had been thought that Mr Erdogan, 52, would need to stay in hospital for a couple of days, doctors and his aides had said, but his condition was not serious and he was released. Akif Beki, his spokesman, said the prime minister’s illness was caused by a fall in his blood sugar levels.

A devout Muslim and a former professional football player, Mr Erdogan has been fasting throughout Ramadan, not eating or drinking during daylight hours while keeping up his usual punishing work schedule. He is said to frequently work late into the night.

“There is no cause for alarm,” Abdullah Gul, foreign minister and number two to the prime minister in the government hierarchy, said.

Investors were momentarily rattled by the news, however, given how much of Turkey’s current economic and political reform programme rests on Mr Erdogan’s ability and willingness to implement it.

The meeting of his ruling Justice and Development party in parliament, a weekly event where he often outlines future policy in speeches to the party’s MPs, was cancelled.

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