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ZEFFIX - Chronic hepatitis B infection
Shire receives royalties from GSK on worldwide ZEFFIX sales. Royalties from sales of ZEFFIX for the three months to March 31, 2008 were $10.4 million, an increase of 14% compared to the same period in 2007 (2007: $9.1 million). The impact of foreign exchange movements has contributed 13% to the reported growth; excluding favourable foreign exchange movements there has been a marginal increase of 1% compared to the same period in 2007.
Other
Other royalties are primarily in respect of REMINYL and REMINYL XL (known as RAZADYNE and RAZADYNE ER in the US), a product marketed worldwide (excluding the UK and the Republic of Ireland) by Janssen Pharmaceutical N.V. ("Janssen"), an affiliate of Johnson & Johnson. Shire has the exclusive marketing rights in the UK and the Republic of Ireland.
Sales of the REMINYL/RAZADYNE range, for the symptomatic treatment of mild to moderately severe dementia of the Alzheimer's type, continue to grow.
Litigation proceedings relating to 3TC, COMBIVIR, EPIVIR, EPZICOM, RAZADYNE, RAZADYNE ER, REMINYL, REMINYL XL and ZEFFIX are ongoing. Further information on these litigations can be found in our filings with the SEC, including our Annual Report on Form 10-K for the year to December 31, 2007.
4. Financial details
Cost of product sales
The cost of product sales increased by 38% to $90.3 million for the three months to March 31, 2008 (14% of product sales), up from $65.3 million in the corresponding period in 2007 (2007: 14% of product sales). The increase in cost of product sales is in line with the growth in product sales of 37%.
Research and development ("R&D")
R&D expenditure increased to $119.1 million for the three months to
March 31, 2008 (19% of product sales), up from $79.0 million in the
corresponding period in 2007 (2007: 17% of product sales). Contributing to
the increased
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