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
Abdominal pain
blurred vision
confusion
decreased urine output
dizziness
drowsiness
dry mouth
fast or irregular heartbeat
flushed, dry skin
fruit-like breath odor
headache
increased hunger
increased thirst
increased urination
irritability
joint pain, stiffness, or swelling
loss of appetite
loss of mental alertness
lower back, side, or stomach pain
mood or mental changes
muscle pain or cramps
nausea or vomiting
numbness or tingling in the hands, feet, or lips
shortness of breath
sweating
swelling of face, hands, feet, ankles, or lower legs
troubled breathing
unexplained weight loss
unusual tiredness or weakness
weak pulse
Rare
Agitation
back pain
black, tarry stools
bleeding gums
blood in the urine or stools
chest pain
convulsions (seizures)
deep or fast breathing with dizziness
dizziness, faintness, or lightheadedness when getting up from a lying or sitting position suddenly
fever
hallucinations
hives
increase in heart rate
increased blood pressure
numbness of feet, hands, and around the mouth
pinpoint red spots on the skin
rapid breathing
stiff neck
sunken eyes
trembling, jerking of hands
unusual bleeding or bruising
weight gain
wrinkled skin
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Difficulty breathing
pain in chest, groin, or legs, especially the calves
severe, sudden headache
slurred speech
sudden loss of coordination
sudden, severe weakness or numbness in the arm or leg
sudden, unexplained shortness of breath
unusual drowsiness, dullness, or feeling of sluggishness
vision changes
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:
Rare
Decreased interest in sexual intercourse
diarrhea
difficulty with moving
ear discomfort
feeling of constant movement of self or surroundings
inability to have or keep an erection
itching skin
loss in sexual ability, desire, drive, or performance
muscle or bone pain
muscle stiffness
nipple tenderness
pain, swelling, or redness in joints
rash
sensation of spinning
shorter than usual time to ejaculation of semen
trouble with hearing
upset stomach
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.
 Bumetanide side effects (more detail)
