BBC.US drugmaker Pfizer is to buy rival Wyeth in a deal worth $68bn (£50bn), the two companies have announced.
The merger will allow Pfizer to protect itself from a drop in revenues when its popular drug Lipitor and other products lose patent protection.
It will also help Pfizer diversify its product portfolio, thanks to Wyeth's presence in biotech drugs and vaccines.
Pfizer, the world's biggest drugs firm, also makes Viagra, while Wyeth produces antidepressant Effexor XR.
It is the biggest merger announced on Wall Street since the credit crunch, and the largest merger in the pharmaceutical industry since Pfizer bought Warner-Lambert for $93.4bn in 2000.
No matter the economic turmoil, people will always need their horribly over priced drugs, and there's still big money being thrown around to dominate. Marvellous.