Generic drug makers Teva Pharmaceutical Industries and Dr Reddy’s Laboratories have announced the commercial launch of olanzapine tablets, a generic version of Eli Lilly antipsychotic Zyprexa.

Teva will introduce tablets in 2.5mg, 5mg, 7.5mg, 10mg, 15mg doses, while Dr Reddy’s will introduce a 20mg tablet. Both companies have been granted a 180-day period of marketing exclusivity in the US for their respective tablets.

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Dr Reddy’s is supplying the 20mg version of the product as part of a commercialisation, manufacture and supply agreement agreed in April 2011.

In addition, Dr Reddy’s will launch its 2.5mg, 5mg, 7.5mg, 10mg, 15mg and 20mg olanzapine tablets upon expiration of the 180-day exclusivity period.

Annual sales of Zyprexa in the US stood at approximately $3.2bn as of September 2011.

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