Georgia's opposition has accused a police colonel of poisoning anti-government demonstrators with adulterated wine.
However officials say the protestors were simply drunk.
Thousands of Georgians have been protesting against President Mikhail Saakashvili, accusing him of corruption and authoritarianism.
Georgy Bukia, a member of Democratic Front, an opposition parliamentary faction, said the demonstrators lost consciousness after drinking wine distributed by a Georgian police colonel.
Keti Kochorashvili, spokeswoman for the Health Ministry, said 24 people had been taken to five hospitals and four people had been already released.
She said that it was not a poisoning, the people were drunk.
Mr Bukia said he believed the poisoning was sanctioned by the authorities and he has asked for a test on the wine.
President Saakashvili is facing his biggest crisis since winning power in a popular revolution four years ago.
In a recorded television broadcast on Sunday he refused to talk to the opposition or accept their demands to bring forward a parliamentary election to early next year.
Another mass protest was scheduled for this afternoon in Tbilisi. Popular discontent has grown because the reforms have done little to improve living standards for many people and corruption remains a problem.
