Repros Therapeutics Inc. (RPRX) said a six-month study of Proellex showed the drug reduced the duration and intensity of pain more effectively than Lucrin when treating endometriosis.
The Woodlands, Texas, pharmaceutical company said it plans to start a Phase II clinical trial of the drug by the end of the year.
Repros's shares closed Monday down 37 cents, or 2.5%, $14.93.
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