Nuvakaan and Tybost

• Generic Name: lidocaine / prilocaine topical
• Dosage Forms: kit
• Other Brand Names: Emla, Emla Anesthetic Disc, Livixil Pak, AgonEaze, Prizopak, LiproZonePak, Medolor Pak, Anodyne LPT

Lidocaine and prilocaine are local anesthetics (numbing medicines). They work by blocking nerve signals in your body.

Lidocaine and prilocaine topical (for the skin) is a combination medicine used to numb the skin or surfaces of the penis or vagina. lidocaine and prilocaine topical is used to prepare you for minor surgery or medical procedures on these areas.

Lidocaine and prilocaine topical may also be used for purposes not listed in this medication guide.

• Generic Name: cobicistat
• Dosage Forms: tablet, film coated
• Other Brand Names: Tybost

Tybost (cobicistat) reduces the action of enzymes in your liver that break down certain antiviral medicines. This allows the antiviral medicines to be used more safely and effectively at lower doses.

Tybost is given together with atazanavir (Reyataz) or darunavir (Prezista) to treat HIV, the virus that can cause acquired immunodeficiency syndrome (AIDS).

Tybost is used to increase your blood levels of these medicines, helping to make them safer and more effective at lower doses.

When given with atazanavir, Tybost is for use in adults and in children who weigh at least 77 pounds (35 kilograms). When given with darunavir, Tybost is for use only in adults.

Tybost is not an antiviral medicine and will not treat HIV or AIDS. It is given only to help increase your blood levels of atazanavir or darunavir.