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:
Incidence not known
Chest pain or discomfort
dizziness
fainting
fast, slow, or irregular heartbeat
increase in urine volume
lightheadedness
persistent vomiting
pounding or rapid pulse
seizures
shakiness
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Abdominal or stomach pain
blurred vision
confusion
confusion about identity, place, and time
dark-colored urine
decrease in frequency of urination
decreased urine
diarrhea
difficulty in passing urine (dribbling)
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
dry mouth
fast, pounding, or irregular heartbeat or pulse
fever
increased thirst
irregular heartbeat
loss of appetite
mood changes
muscle cramps or spasms
muscle pain or stiffness
nausea or vomiting
nervousness
numbness or tingling in the hands, feet, or lips
pain or discomfort in the arms, jaw, back, or neck
painful urination
shakiness in the legs, arms, hands, or feet
shortness of breath
sweating
unusual tiredness or weakness
vomiting of blood or material that looks like coffee grounds
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:
Incidence not known
Headache
irritability
restlessness
sleeplessness
trouble sleeping
unable to sleep
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.
 Quibron-T/SR side effects (more detail)
