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Akorn, Henry Schein and Merck are the Yahoo Finance charts of the day.

Akorn (AKRX): Shares tumbling here, down over 33%.  It’s bad news for the generic drugmaker, as Germany’s Fresenius is ditching its plan to buy Akorn following allegations of breaches of FDA data integrity rules.

Henry Schein (HSIC): Shares climbing in early trade, up around 6%. The health care products maker is going to spin off and merge its Animal Health business with startup Vets First Choice, an online platform for veterinarians.

Merck (MRK): Shares up here in early trade, down around 2%. Rounding out our third health care related stock here, Merck shares are rallying following a rare double-upgrade by Goldman to Conviction Buy, citing its Keytruda lung cancer breakthrough.

For more on today's big stock movers check out the Final Round, live at 3:55 p.m. ET, right here on Yahoo Finance.