STALLERGENES : 1st Quarter 2010 : Sustained 13% Growth

Antony, France, April 15, 2010 (ots/PRNewswire) -

EURm 2009 09/08 2010 10/09
EURm %Sales Var.% EURm %Sales Var.%
Southern Europe 41.8 74 10 46.9 74 12
(1)
Other EU countries 12.7 23 36 14.6 23 15
Other markets 1.7 3 0 1.8 3 8
SLIT 47.2 84 16 55.0 87 17
SCIT 6.9 12 11 6.3 10 (8)
Other products 2.1 4 11 2.0 3 (6)
Total Q1 sales 56.2 100 15 63.3 100 13

Sales

Consolidated sales for the 1st quarter grew by 13% to EUR 63.3
million (up 15% in 2009). Foreign exchange effects were positive by
EUR 0.3 million.

This growth confirms the supremacy of SLIT over SCIT,
respectively posting growth of 17% and a decline of 8% over the 1st
quarter. SLIT now accounts for 87% of the laboratory's sales.

The analysis by geographic region highlights satisfactory growth
in all markets, with the "Other EU countries" region continuing to
drive Group growth under the effect of the significant increase in
Oralair(R) sales in Germany.

Changes in financial position and significant transactions and
events of the quarter

The financial position improved: cash net of debt was largely
positive at 31 March, whereas it was negative at the same time last
year.

Preliminary results of the Oralair(R) grasses trial in the US
should be obtained and released before the end of April.

Outlook for the current financial year

The good first quarter results confirmed the guidance for
full-year sales growth in excess of 8%, featuring further improvement
in profit margins.

About Stallergenes

Stallergenes is a European biopharmaceutical laboratory
specialising in treatments by immunotherapy for the prevention and
treatment of allergy-related respiratory conditions, such as rhino
conjunctivitis, rhinitis and allergic asthma. Stallergenes is ranked
seventh among French pharmaceutical laboratories. A pioneer and a
leader in immunotherapy treatments by sublingual administration,
Stallergenes dedicates more than 20% (gross) of its sales to its
Research and Development activities, which are primarily directed at
developing a new therapeutic range enabling the provision of
immunotherapy treatments by sublingual tablets.

Stallergenes realised 2009 sales of EUR 193 million, with over
500,000 patients treated with Stallergenes desensitisation products.

Euronext Paris (Compartment B).
SBF 120 index.
ISIN code: FR0000065674
Reuters code: GEN.PA
Bloomberg code: GEN.FP

For further financial information, please visit our website:
http://www.stallergenes.com

ots Originaltext: Stallergenes
Im Internet recherchierbar: http://www.presseportal.de

Contact:
CONTACT: Contacts: Albert Saporta, Chairman and CEO,
Tel.+33-1-55-59-20-04, Christian Thiry, Chief Financial Officer,
Tel.+33-1-55-59-20-95, e-mail: investorrelations@stallergenes.fr;
Investor andAnalyst Relations: Lucile de Fraguier, Pavie Finance,
Tel.+33-1-42-15-04-39, e-mail: contact@pavie-finance.com;
Stallergenes PressRelations: Lise Lemonnier, Communication Officer,
Tel. +33-1-55-59-20-96,e-mail: llemonnier@stallergenes.fr