Possible side effects:

Abdominal or stomach pain and tenderness
black, tarry stools
blistering, peeling, or loosening of the skin
blood in the urine
bloody nose
bloody stools
blurred or loss of vision
body aches or pain
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
chest pain or discomfort
confusion about identity, place, and time
congestion
constipation
cough
cracks in the skin
crying
decreased awareness or responsiveness
decreased urine output
depersonalization
diarrhea
difficulty with breathing or swallowing
difficulty with swallowing
dilated neck veins
disturbed color perception
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
double vision
dryness or soreness of the throat
dysphoria
euphoria
extreme fatigue
fast, pounding, slow, or irregular heartbeat
fever and chills
general feeling of discomfort, illness, or weakness
hair loss
halos around lights
headaches
heavier menstrual periods
hives
hoarseness
irregular breathing
itching
lightheadedness, dizziness, or fainting
loss of heat from the body
mental depression
mimicry of speech or movements
muscle or joint pain
mutism
nausea
negativism
night blindness
noisy breathing
overbright appearance of lights
paleness or cold feeling in the fingertips and toes
paranoia
peculiar postures or movements, mannerisms, or grimacing
pinpoint red or purple spots on the skin
puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
quick to react or overreact emotionally
rapidly changing moods
rectal bleeding
red skin lesions, often with a purple center
red, irritated eyes
red, swollen skin
reddening of the skin, especially around the ears
runny nose
scaly skin
seeing, hearing, or feeling things that are not there
severe sleepiness
short-term memory loss
shortness of breath
skin irritation or rash, including rash that looks like psoriasis
skin rash
sores, ulcers, or white spots in the mouth or on the lips
sweating
swelling of the eyes, face, fingers, feet, or lower legs
swollen glands
tender, swollen glands in the neck
tightness in the chest
tingling or pain in fingers or toes when exposed to cold
trouble with swallowing
troubled breathing
tunnel vision
unusual bleeding or bruising
unusual tiredness or weakness
voice changes
vomiting
weight gain
wheezing

Think I'll nap instead.