What side effects may I notice from receiving Fosphenytoin?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-confusion
-dark yellow or brown urine
-difficulty breathing, wheezing or shortness of breath
-double vision or uncontrollable and rapid eye movement
-fever, sore throat
-headache
-loss of seizure control
-poor control of body movements or difficulty walking
-rash, fever, and swollen lymph nodes
-redness, blistering, peeling or loosening of the skin, including inside the mouth
-unusual bleeding or bruising, pinpoint red spots on skin
-vomiting
-worsening of mood, thoughts or actions of suicide or dying
-yellowing of the eyes or skin

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-constipation
-difficulty sleeping
-excessive hair growth on the face or body
-nausea

This list may not describe all possible side effects for Fosphenytoin. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.