Insurance Coverage: Many major insurance plans no longer cover Istalol. Learn More
What should I watch for?
Visit your doctor or health care professional for regular exams. Ask your doctor or health care professional if you should continue to use this medicine if you injure your eyes, get an eye infection, or need eye surgery.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that requires mental alertness until you know how this medication affects you. To reduce the risk of dizzy or fainting spells, do not sit or stand up quickly.
If you wear soft contact lenses, you should not put this medicine in your eyes while wearing the lenses. After using the eye drops, wait about 15 minutes before putting lenses in your eyes.
Wear dark glasses if this medicine makes your eyes more sensitive to light.
Common and Rare Side Effects
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:
burning or stinging in the eye
Arm, back, or jaw pain
blue lips, fingernails, or skin
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
change in vision
chest pain or discomfort
chest tightness or heaviness
confusion about identity, place, and time
continuing ringing or buzzing or other unexplained noise in ears
coughing that sometimes produces a pink frothy sputum
difficult, fast, noisy breathing
difficulty with chewing, swallowing, or talking
dilated neck veins
discharge, excessive tearing
disturbed color perception
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
dry or itching eyes
false sense of well-being
fast, slow, irregular, pounding, or racing heartbeat or pulse
fear or nervousness
feeling of having something in the eye
fever and chills
flashes of light, floaters in vision
general feeling of discomfort or illness
halos around lights
inability to speak
irregular, fast or slow, or shallow breathing
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
lightheadedness, dizziness, or fainting
loss of vision
muscle or joint pain
no blood pressure or pulse
overbright appearance of lights
pain, tension, and weakness upon walking that subsides during periods of rest
paleness or cold feeling in the fingertips, toes, hands, and feet
pounding in the ears
puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
redness of the skin
redness, pain, swelling or irritation of the eye, eyelid, or inner lining of the eyelid
seeing, hearing, or feeling things that are not there
severe numbness, especially on one side of the face or body
severe or sudden headache
skin irritation or rash, including rash that looks like psoriasis
stopping of heart
swelling of the face, fingers, feet, lower legs, and ankles
unusual tiredness or weakness
weakness in arm and/or leg on one side of the body, sudden and severe
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:
Acid or sour stomach
body aches or pain
lack or loss of strength
loss of appetite
loss of voice
sleepiness or unusual drowsiness
stomach discomfort, upset, or pain
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.