Extavia (generic name is Interferon beta 1-b injection) is used to reduce symptoms of relapsing multiple sclerosis (MS). This drug is not a cure for MS; it will only decrease the frequency of relapsing symptoms. However, you can save on your Extavia cost with a free Extavia coupon from our site. Just enter your zip code, dosage, and quantity, and then click ‘See My Savings.’ Browse the list of nearby pharmacies that accept our coupon and their estimated prices for Extavia with the Extavia discount. Then, print or download your coupon for Extavia and bring it to the pharmacy of your choice to save on the cost of your medication. Our coupons do not expire, so you can use your Extavia coupon card to save any time you fill your prescription.

Extavia is used to reduce symptoms of relapsing multiple sclerosis (MS). MS is a disease in which the nerves do not function normally and patients experience symptoms such as numbness, weakness, loss of muscle coordination, vision problems, and problems with bladder control and speech.

Extavia belongs to a class of drugs called immunomodulators.

The recommended maintenance dose of Extavia for the treatment of symptoms of relapsing MS is 0.25 mg (1 mL) one time every other day. Consult with your doctor for specific dosage and use information for this drug.

Contact your doctor if any of these symptoms persist or become severe:


  • headache

  • tight muscles

  • weakness

  • changes in sex drive or ability (in men)

  • vaginal bleeding or spotting between menstrual periods

  • change in coordination

Contact your doctor immediately if you experience any of these serious symptoms:

  • bruising, pain, redness, swelling, or tenderness at the injection site

  • blackening of skin or drainage at the injection site

  • yellowing of the skin or eyes

  • extreme tiredness

  • nausea or vomiting

  • loss of appetite

  • unusual bruising or bleeding

  • anxiety, confusion, irritability, or nervousness

  • difficulty falling asleep or staying asleep

  • suicidal thoughts, suicidal planning, or suicide attempts

  • new or worsening depression

  • aggressive or violent behavior

  • hallucinations

  • seizures

  • shortness of breath

  • rapid or abnormal heartbeat

  • chest pain or tightness

  • pale skin

  • rash, hives, or itching

  • swelling of the eyes, face, mouth, tongue, throat, hands, arms, feet, ankles, or lower legs

  • difficulty breathing or difficulty swallowing

  • pale, red or bloody stool or diarrhea

  • dark urine, decreased urination, or blood in the urine

  • stomach pain

  • slow or difficult speech

  • purple patches or pinpoint dots (rash) on the skin

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