A significant offer revealed on Monday will integrate generic drugmaker Mylan with a system of Pfizer that makes off-patent items like Viagra.

The all-stock merger is a quote to renew Mylan, best understood for making the EpiPen allergic reaction shot. Mylan’s shares have actually lost nearly half their worth over the previous year, though they rose 14% on Monday after the offer was revealed. Pfizer’s stock fell 2%.

The offer is currently dealing with some difficult concerns from Wall Street.

In a Monday early morning teleconference, experts asked sixty-four-thousand-dollar questions about the offer, consisting of about financier self-confidence, development chances and the underlying company design.

Executives sometimes got testy, looking for to depict the spinoff as a transformational brand-new business entity.

“This has to do with boosting every element of our company, beginning with the Board of Directors, beginning with management, beginning all the method down the line,” stated long time Mylan Chairman Robert Coury, who will remain on at the brand-new company as executive chairman.

Other familiar faces at the top of the brand-new business consist of Rajiv Malik, a long time officer at Mylan. Michael Goettler, a pharma market veteran who works as group president of Pfizer’s Upjohn company, will be the brand-new CEO.

Noteworthy lacks from that list consist of Heather Bresch, Mylan’s CEO who led the business throughout its EpiPen scandal. Bresch will be retiring, the business stated. Mylan CFO Ken Parks is likewise out and the brand-new business is looking for a CFO.

Learn More: The 2 huge pharma business behind Viagra and EpiPen are wagering an uncommon offer can produce a brand-new type of drug business that you’ll in fact wish to buy. One slide exposes why.

Keep Reading for the 3 most significant concerns experts asked that expose essential obstacles dealing with the brand-new business