Retail pharma giants' stock prices plunged Nov. 17, the same day Amazon launched a new online pharmacy that allows patients to purchase prescriptions through its website.
By the market close, CVS Health shares dropped 8.6 percent, Walgreens Boots Alliance shares dropped 9.6 percent and Rite Aid shares dropped 16.2 percent, The Motley Fool reported.
The shares are likely to remain under pressure as Amazon continues to break into the pharmacy industry, according to The Motley Fool.