Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
More common
Black, tarry stools
blistering, peeling, loosening of the skin
chest pain
chills
cough
diarrhea
difficulty seeing at night
fever
increased sensitivity of the eyes to sunlight
itching, rash
joint or muscle pain
painful or difficult urination
red irritated eyes
red skin lesions, often with a purple center
sore throat
sores, ulcers, or white spots on the lips or in the mouth
swollen glands
trouble breathing
unusual bleeding or bruising
unusual tiredness or weakness
vision changes
Less common
Bloating or swelling of the face, arms, hands, lower legs, or feet
blurred vision
chills
clay-colored stools
confusion
dark urine
decreased urine
dizziness
dry mouth
faintness or lightheadedness when getting up suddenly from a lying or sitting position
feeling of warmth
increased thirst
irregular or pounding heartbeat
loss of appetite
muscle pain or cramps
muscle spasms or twitching
nausea
nervousness
numbness or tingling in the hands, feet, or lips
pounding in the ears
rapid weight gain
rash with flat lesions or small raised lesions on the skin
redness of the face, neck, arms, and occasionally, the upper chest
seizures
stomach pain
slow or fast heartbeat
sweating
trembling
unpleasant breath odor
vomiting of blood
yellow eyes or skin
Rare
Agitation
blistering, peeling, or loosening of the skin
hostility or anger
increased sensitivity of the skin to sunlight
irritability
redness or other discoloration of the skin
seeing things that are not there
severe sunburn
Incidence not known
Bone pain
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Less common
Diarrhea
headache
vomiting
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
 Voriconazole side effects (more detail)
