Fomivirsen (Into the eye)


Fomivirsen (foe-mi-VIR-sen)

Treats an infection called cytomegalovirus (CMV) retinitis in patients with acquired immune deficiency syndrome (AIDS).

Brand Name(s)

When This Medicine Should Not Be Used

How to Use This Medicine


  • Your doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given as a shot into your eye by your doctor. Your eye will be numbed with an anesthetic medicine before the injection.

If a dose is missed:

  • This medicine needs to be given on a fixed schedule. If you miss a dose, call your doctor for instructions.

Drugs and Foods to Avoid

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you have received cidofovir (Vistide®) as an injection into your veins or eyes during the past 2 to 4 weeks.

Warnings While Using This Medicine

  • Make sure your doctor knows if you are pregnant or breastfeeding.
  • This medicine treats CMV only in the eye(s). It will not treat CMV that has infected the rest of your body.
  • You will need to have your eyes checked at regular visits while you are receiving this medicine.

Possible Side Effects While Using This Medicine

Call your doctor right away if you notice any of these side effects:

  • Allergic reaction: Itching or hives, swelling in face or hands, swelling or tingling in the mouth or throat, tightness in chest, trouble breathing
  • Blurred vision
  • Eye pain, swelling, or irritation
  • "Seeing stars" that appear to be floating
  • Sensitivity to light

If you notice these less serious side effects, talk with your doctor:

  • Fever
  • Headache
  • Mild skin rash
  • Nausea, vomiting, diarrhea
  • Sinus pain or stuffy nose
  • Stomach pain

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088

Version Info

  • Last reviewed on 10/4/2017

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission ( URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2013 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.