Product Sales

EYLEA^® net product sales in the United States totaled $654.6 million and $414.8 million for the three months ended June 30, 2015 and 2014, respectively, and $1,195.7 million and $773.8 million for the six months ended June 30, 2015 and 2014, respectively. In addition, ARCALYST^® net product sales totaled $3.2 million for each of the three-month periods ended June 30, 2015 and 2014, respectively, and $6.7 million and $6.6 million for the six months ended June 30, 2015 and 2014, respectively.

The Company recorded 69% and 73% for the three months ended June 30, 2015 and 2014, respectively, and 69% and 76% for the six months ended June 30, 2015 and 2014, respectively, of its total gross product revenue from sales to Besse Medical, a subsidiary of AmerisourceBergen Corporation.

Revenue from product sales is recorded net of applicable provisions for rebates and chargebacks under governmental programs, distribution-related fees, and other sales-related deductions. The following table summarizes the provisions, and credits/payments, for these sales-related deductions during the six months ended June 30, 2015 and 2014.



	Rebates & Chargebacks			Distribution- Related Fees			Other Sales- Related Deductions			Total
Balance as of December 31, 2014	$	3,083		$	21,166		$	532		$	24,781
Provision related to current period sales	25,481			54,747			3,454			83,682
Credits/payments	(23,090		)	(36,433		)	(3,482		)	(63,005		)
Balance as of June 30, 2015	$	5,474		$	39,480		$	504		$	45,458

Balance as of December 31, 2013	$	4,400		$	19,663		$	538		$	24,601
Provision related to current period sales	14,817			36,206			818			51,841
Credits/payments	(15,077		)	(35,449		)	(834		)	(51,360		)
Balance as of June 30, 2014	$	4,140		$	20,420		$	522		$	25,082