Updated from Tuesday, March 2

NEW YORK (

TheStreet

) -- Drug giant

Pfizer

(PFE) - Get Report

, the world's biggest drug-maker, may be getting bigger. Pfizer is reportedly bidding more than $4 billion to acquire German generic drug firm

Ratiopharm

.

The Pfizer bid, first reported by

Bloomberg

on Tuesday afternoon, would be the biggest generic drug deal since

Teva Pharmaceutical Industries

(TEVA) - Get Report

bought

Barr Pharmaceuticals

in 2008 for $7.4 billion.

If Pfizer is successful, its generic business would rise to an estimated $11 billion, nearing Teva's lead position in the generic market, according to the

Bloomberg

report.

Teva is not planning to allow Pfizer to match its generic drug-buying prowess so easily, and is also bidding for the German generic drug maker, which is owned by the Merckle family.

Iceland-based

Actavis Group

is also reportedly among Ratiopharm's suitors.

Given the number of suitors for the German drug maker -- being sold by the Merckle family as a way to repay debt -- Pfizer is reportedly going to make its case to Ratiopharm's management as soon as this week,

Bloomberg

reports.

-- Reported by Eric Rosenbaum in New York.

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