Based on the information provided, I found two sources that could help answer your question. The first source is a website that focuses on drug patent watch, and the second and third sources are a medical study and a medical resource website that provide information about Tigecycline's pricing.

Tigecycline is a broad-spectrum antibiotic that is used to treat a variety of bacterial infections. It is available under the brand name Tygacil, which is manufactured by Pfizer.

According to DrugPatentWatch.com [1], Tigecycline's patent expired in 2015, which allowed generic versions of the drug to enter the market. As a result, there is now a price gap between the brand-name version and the generic versions of Tigecycline.

The medical study published in the Journal of Managed Care Pharmacy in 2011 [2] provides some insight into the price gap between Tigecycline generics and the brand. The study found that the average wholesale price (AWP) of Tigecycline was $2,346.50 for a 200mg dose, while the AWP of the generic version was $1,455.20 for a 200mg dose. This represents a price difference of approximately 38%.

The medical resource website Medscape [3] also provides some information on Tigecycline's pricing. According to Medscape, the average cost of a 30-day supply of Tigecycline is $2,261, while the cost of a 30-day supply of the generic version is $1,455. This represents a price difference of approximately 36%.

In summary, based on the available information, there is a price gap between Tigecycline generics and the brand. The price difference varies, but it is estimated to be around 36%-38%.

Sources:

* <https://www.drugpatentwatch.com/p/tradename/TIGECYCLINE>
* <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3053506/>
* <https://reference.medscape.com/drug/tygacil-tigecycline-342527>