A patent currently prohibits any generic Januvia from being manufactured and sold. The earliest that an approved generic version of Januvia could become available is in 2017, when the patent expires. Until an approved generic version of Januvia is available, you should be wary of so-called "generic Januvia" offered for sale over the Internet.
Generic Januvia: An OverviewJanuvia® (sitagliptin) is a prescription medication that is used to treat type 2 diabetes (also known as non-insulin-dependent diabetes or adult-onset diabetes). It can be used alone or in combination with other diabetes medication.
Januvia is manufactured by Merck & Co, Inc. It is currently under the protection of a patent that prevents any generic Januvia from being manufactured in the United States. Yet, if you search the Internet for "generic Januvia," you may find a number of companies selling it. These medicines are fake, substandard, and potentially dangerous. While there may be generic Januvia available from another country, there is really no way of knowing if such products are genuine. Therefore, you should not buy any generic Januvia until there is an approved generic available.