FDA Asks For More Info On Dyax Candidate DX-88

CAMBRIDGE, Mass. (AP) — The Food and Drug Administration wants more information about Dyax Corp.'s drug candidate DX-88 but won't require the company to conduct more tests, Dyax said late Thursday.

Dyax said the FDA asked for a plan to evaluate and mitigate risks of the drug. The agency also requested more data on the chemistry, manufacturing and controls of DX-88.

The product is intended to treat acute attacks of hereditary angioedema, a protein deficiency disease that can cause dangerous swelling under the skin.

Last month, an FDA panel recommended that the drug be approved in a vote of six to five, with two panelists abstaining.

Shares of Dyax fell 35 cents, or 12.7 percent, to $2.30 in aftermarket electronic trading Thursday. The stock has ranged from $1.80 to $5.35 over the past year.