By Joseph Walker 
 

Botox-maker Allergan Inc. (AGN) doesn't want to be known as just a pretty face.

The pharmaceutical firm famous for its cosmetic beauty products has agreed to pay $958 million to purchase MAP Pharmaceuticals Inc. (MAPP), an unproven firm whose migraine headache therapy faces a crucial approval decision by the U.S. Food and Drug Administration.

MAP Pharmaceuticals, of Mountain View, Calif., is seeking approval for Levadex, a new version of an existing drug to treat migraines. Allergan hopes that Levadex will complement its effort to expand sales of its flagship wrinkle-drug Botox into medical uses including headaches and bladder control.

The acquisition, Allergan's largest since its 2005 purchase of breast-implant-maker Inamed Corp. for $3.4 billion, carries risks. The FDA rejected approval for Levadex in March, citing concerns about the drug's manufacturing process, though not its safety or effectiveness, according to MAP.

The FDA accepted the company's revised drug application in November, and the agency is expected to make an approval decision by April 15.

Allergan demonstrated confidence in the drug's chances for success with its offer of $25 per share for MAP, a 60% premium over the company's closing price of $15.58 through Tuesday's close.

If Levadex is approved, Allergan stands to increase its exposure to physicians treating migraines, potentially improving sales for both headache drugs.

"MAP should solidify AGN's position as a leading migraine company," Larry Biegelsen, a Wells Fargo analyst, said Wednesday. "Given that peak sales for MAP's lead product, migraine compound Levadex, could reach [$250 million to $500 million], the valuation seems reasonable to us."

Map shares surged 59.3% to $24.82, an all-time high, in premarket trading. Allergan shares, up 18.3% in the last 12 months, rose 0.2% to $106.

Allergan already owns the right to market Levadex to brain and pain specialists in the U.S. and Canada through a 2011 licensing deal with MAP, to which it has paid $80 million in upfront and milestone payments. The merger enables Allergan to market Levadex globally and to general practitioners.

Allergan will hold a conference call Wednesday at 11 a.m. EST to discuss the deal, where the company is likely to face questions about why it needed to acquire MAP when it already owns the rights to much of its potential sales.

Investors also will want to hear why Allergan thinks MAP's only drug, Levadex, an orally-inhalable version of a drug currently available by injection or nasal spray, is worth such a high purchase premium.

MAP lost $12.6 million in the quarter ending Sept. 30, and had cash and cash equivalents of $114.2 million.

Allergan said in October that it would seek a sale of its weight-loss device unit, Lap-Band, after consumer credit pressures caused sales to fall 25% in the third-quarter. Allergan said at the time that it would seek to make an acquisition to offset any dilution from a Lap-Band sale, which has not yet been announced.

The acquisition, announced after Tuesday's close, demonstrates Allergan's intention to expand its business beyond its core product line of beauty drugs, including the skin-tightening Botox, lip-enhancers and breast implants.

"One of the key drivers of Allergan's continued success is our focus on medical specialties where we have extensive knowledge of physician and patient needs, and can provide a broad portfolio of products," Chief Executive David E.I. Pyott said.

The FDA approved Botox, which is essentially a muscle-contracting agent, for overactive bladders, or urinary incontinence, earlier this month.

Botox was approved to prevent migraine headaches in 2010, and is estimated to have generated U.S. sales of $130 million for that indication in 2012, according to Mr. Biegelsen. Overall, Allergan--which hasn't reported its fourth-quarter results yet--projects up to $1.8 billion in total Botox sales for 2012.

The MAP deal was unanimously approved by the boards of Allergan and MAP, and it should be completed in the first six months of this year, the companies said.

Write to Joseph Walker at Joseph.Walker@dowjones.com

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