Illumina, Spark Therapeutics and Endo International were among the biotech stock movers in premarket trading on Aug. 2.
Geron and Endo and were among the biotech stock movers on Aug. 1.
McCaskill requested that four more drug companies and three drug distributors turn over documents.
IntelliPharmaceuticals has a bio-equivalent to OxyContin, but says it is harder to tamper with. The pharma company is hoping to gain a recommendation from an FDA committee on Wednesday.