Founded in 1968 by Dr Alejandro Zaffaroni; the company's name is a portmanteau of his name. ALZA pioneered the field of drug delivery systems, bringing over 20 prescription pharmaceutical products to market, and employing about 10,000 people during 20 years. ALZA was acquired by Johnson & Johnson in May 2001, in a stock-for-stock transaction worth US$10.5 billion.
Drug delivery platforms
The company owns the patents on the following delivery platforms:
- Alzamer Depot
- Duros implant
- E-Trans electrotransport
- OROS (Osmotic Release Oral Systems) 
- Macroflux transdermal system
- Stealth liposomal
Marketed ALZA Products
- Catapres-TTS now marketed by Janssen Pharmaceutica
- Covera HS - with G.D.Searle
- Ditropan XL
- Glucotrol XL - with Pfizer
- Nicoderm CQ
- Procardia XL - with Pfizer
- Sudafed 24 hour - Efidac/24
ALZA built its first corporate headquarters in 1971, at 950 Page Mill Road in Palo Alto, California, now occupied by law firm Wilson Sonsini Goodrich & Rosati. In 1999, ALZA moved its headquarters to Shoreline Business Park, where it remained until July 2007, when Johnson & Johnson laid off some of its 600 employees there and vacated the space.  The remaining employees were relocated to two buildings elsewhere in the Shoreline Business Park. ALZA is now in operation in Vacaville, California.
- Gareth Macdonald (28 April 2009). "Patheon to make Oros-based depression and allergy drugs". Decision News Media SAS.
- Simonson, Sharon (26 August 2007). "''ALZA's exit could mean another office space buy for Google'' - Silicon Valley/San Jose Business Journal". Sanjose.bizjournals.com. Retrieved 2011-07-29.
- "''ALZA Corp. leaving city after 17 years'' - Mountain View Voice". Mv-voice.com. Archived from the original on 24 July 2011. Retrieved 2011-07-29.