The London club parted with £15million to make Carroll their permanent property in June. The hulking striker had impressed during a loan spell at Upton Park in 2012-13, and the deal relieved £10.75m Matt Jarvis of his status as West Ham's record signing.
However, the England international has yet to feature this season due to a heel injury and Allardyce's men have struggled for goals in his absence.
"(When) Andy Carroll gets back to full training, it's probably the best part of another four weeks before he gets back on the field in the first team, because he has to start a four-week pre-season, which is the minimum time for a pre-season," explained the West Ham manager.
"We have to use him sparingly, because he's in the middle of a pre-season so he can catch up with the rest of the lads," said Allardyce.
