*Rigel shares slump 33 pct, AstraZeneca little changed. LONDON, April 5- AstraZeneca's experimental rheumatoid arthritis pill fostamatinib met only one of two goals in a late-stage clinical trial, leaving the future of one of the group's few advanced pipeline products uncertain.
LONDON, April 5- AstraZeneca's experimental rheumatoid arthritis pill fostamatinib met only one of two goals in a late-stage clinical trial, leaving the future of one of the group's few advanced pipeline products uncertain.
*Analysts' expectations for AstraZeneca, Rigel product low. *AstraZeneca shares fall 3 percent, Rigel dives 31 percent. LONDON, Dec 13- An experimental rheumatoid arthritis drug from AstraZeneca proved inferior to Abbott Laboratories' Humira in a clinical study, knocking hopes for one of the few late-stage products in the company's pipeline.
*Analyst expectations for AstraZeneca product already low. LONDON, Dec 13- An experimental rheumatoid arthritis drug from AstraZeneca proved inferior to Abbott Laboratories' Humira in a clinical study, knocking hopes for one of the few late-stage products in the company's pipeline.