Panacea (noun)

1. A solution or remedy that is believed to cure all problems or ills.
2. A supposed remedy that is capable of curing all diseases and prolonging life.

Origin:

Derived from the greek word "panakeia" meaning "remedy for all ills".

Examples:

1. The new medication was touted as a panacea for all types of cancer.
2. The panacea was not as effective as promised.
3. The scientist claimed that his invention was a panacea for all energy problems.
4. The politician promised a panacea for all economic ills.
5. The book promised a panacea for all relationship problems.