Osmolex ER and Viread

• Generic Name: amantadine
• Dosage Forms: tablet, extended release
• Other Brand Names: Gocovri, Osmolex ER, Symmetrel

Osmolex ER is an antiviral medicine that blocks the actions of viruses in your body.

Osmolex ER is used to treat or prevent influenza A in adults and children. This medicine may not be effective during every flu season because certain strains of the virus may be resistant to Osmolex ER. This medicine should not be used in place of getting a yearly flu shot. The Centers for Disease Control recommends an annual flu shot to help protect you each year from new strains of influenza virus.

Osmolex ER is also used to treat Parkinson's disease and "Parkinson-like" symptoms such as stiffness or tremors, shaking, and repetitive uncontrolled muscle movements that may be caused by the use of certain drugs.

Osmolex ER may also be used for purposes not listed in this medication guide.

• Generic Name: tenofovir
• Dosage Forms: tablet, coated; oral powder
• Other Brand Names: Viread, Vemlidy

Viread (tenofovir disoproxil fumarate) is an antiviral medicine that prevents human immunodeficiency virus (HIV) or hepatitis B from multiplying in your body.

Viread is used to treat HIV, the virus that can cause acquired immunodeficiency syndrome (AIDS). This medicine is not a cure for HIV or AIDS.

Viread is also used to treat chronic hepatitis B infection.

Viread is for use in adults and children who are at least 2 years old and who weigh at least 22 pounds (10 kilograms).