Agbonlahor was photographed smoking a shisha pipe in Dubai in March and Villa excluded him from their squad for the weekend’s 4-0 defeat to Chelsea.
However, the club have decided there is no need for any additional disciplinary action.
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Agbonlahor is Villa's longest-serving current player, although he has only made 15 Barclays Premier League appearances for the bottom club this season.
He signed a four-year contract in 2014 but has scored just once this season.
Villa lost 4-0 at home to Chelsea and relegation is seemingly inevitable. They are currently 15 points below fourth from bottom Norwich, with just six matches remaining.
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Agbonlahor suspended as Aston Villa investigate shisha pipe incident