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
Being forgetful
changes in patterns and rhythms of speech
clumsiness or unsteadiness
difficulty with coordination
discouragement
drowsiness
feeling sad or empty
irritability
lack of appetite
lightheadedness
loss of interest or pleasure
relaxed and calm
shakiness and unsteady walk
sleepiness
slurred speech
tiredness
trouble concentrating
trouble performing routine tasks
trouble sleeping
trouble speaking
unsteadiness, trembling, or other problems with muscle control or coordination
unusual tiredness or weakness
Less common
Blurred vision
body aches or pain
burning, crawling, itching, numbness, prickling, "pins and needles, or tingling feelings
changes in behavior
chills
clay-colored stools
confusion about identity, place, and time
dark urine
decrease in frequency of urination
decrease in urine volume
difficult or labored breathing
difficulty in passing urine (dribbling)
difficulty with concentration
difficulty with moving
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
ear congestion
environment seems unreal
fainting
fear or nervousness
feeling of unreality
feeling warm
general feeling of discomfort or illness
headache
hyperventilation
inability to move the eyes
inability to sit still
increased blinking or spasms of the eyelid
irregular heartbeats
itching or rash
joint pain
lack or loss of self-control
loss of bladder control
loss of coordination
loss of memory
loss of voice
mood or mental changes
muscle aches, cramps, pain, stiffness, or weakness
need to keep moving
problems with memory
restlessness
runny or stuffy nose
seeing, hearing, or feeling things that are not there
seizures
sense of detachment from self or body
shaking
shivering
sticking out of the tongue
stomach pain
sweating
swollen joints
talkativeness
tightness in the chest
trouble with balance
twitching, twisting, or uncontrolled repetitive movements of the tongue, lips, face, arms, or legs
uncontrolled twisting movements of the neck, trunk, arms, or legs
unpleasant breath odor
unusual dullness or feeling of sluggishness
unusual facial expressions
unusually deep sleep
unusually long duration of sleep
vomiting of blood
yellow eyes or skin
Rare
Actions that are out of control
attack, assault, or force
continuing ringing or buzzing or other unexplained noise in the ears
decreased awareness or responsiveness
deep or fast breathing with dizziness
ear pain
false or unusual sense of well-being
fast, irregular, pounding, or racing heartbeat or pulse
feeling jittery
feeling unusually cold
generalized slowing of mental and physical activity
hearing loss
hoarseness
lack of feeling or emotion
loss of control of the legs
loss of strength or energy
nightmares
numbness of the feet, hands, and around mouth
severe sleepiness
shakiness in the legs, arms, hands, or feet
sleep talking
swelling
talking, feeling, and acting with excitement
thoughts of killing oneself
uncaring
unusual weak feeling
voice changes
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Confusion
loss of consciousness
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:
More common
Absent, missed, or irregular menstrual periods
decreased appetite
decreased interest in sexual intercourse
decreased sexual performance or desire abnormal ejacul*tion
difficulty having a bowel movement (stool)
inability to have or keep an erection
increased appetite
increased in sexual ability, desire, drive, or performance
increased interest in sexual intercourse
increased weight
loss in sexual ability, desire, drive, or performance
stopping of menstrual bleeding
watering of the mouth
Less common
Blistering, crusting, irritation, itching, or reddening of the skin
change in taste bad unusual or unpleasant (after) taste
cracked, dry, or scaly skin
double vision
feeling of warmth
menstrual changes
pelvic pain
redness of the face, neck, arms, and occasionally, upper chest
seeing double
stomach bloating and cramping
sudden sweating
unexplained runny nose or sneezing
Rare
Acid or sour stomach
belching
bigger, dilated, or enlarged pupils (black part of the eye)
change in color vision
difficulty seeing at night
feeling of constant movement of self or surroundings
feeling of relaxation
hives or welts
increased sensitivity of the eyes to sunlight
indigestion
redness of the skin
sensation of spinning
stomach discomfort or upset
Incidence not known
Blistering, peeling, or loosening of the skin
red, irritated eyes
red skin lesions, often with a purple center
sores, ulcers, or white spots in the mouth or on the lips
swelling of the breasts or breast soreness in both females and males
unexpected or excess milk flow from the breasts
