The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Sleepiness (26%)
- Fever (13%)
- Upper respiratory tract infection (12%)
- Low energy (10%)
- Drooling (9%)
- Acting aggressive or being angry or violent (8%)
- Vomiting (7%)
Less Common Side Effects
- Cough
- Slurred speech
- Trouble swallowing
- Constipation
- Pain with urination
- Changes in appetite
- Trouble sleeping
- Problems with coordination
Clobazam serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Serious allergic and skin reactions: fever, sore throat, fatigue, rash, hives, painful blisters, skin reddening, skin peeling, swollen lymph nodes
- Severe sleepiness and dizziness
- Suicidal behavior or thoughts of self-harm
Source: DailyMed
More on Clobazam side effects

The following Clobazam side effects have also been reported
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
Difficulty with swallowing
shakiness and unsteady walk
unsteadiness, trembling, or other problems with muscle control or coordination
Less common
Change in speech pattern
restlessness
slurred speech
trouble sitting still
trouble speaking
Incidence not known
Agitation
black, tarry stools
bleeding gums
blistering, peeling, or loosening of the skin
blood in the urine or stools
chills
confusion as to time, place, or person
difficult or trouble breathing
holding false beliefs that cannot be changed by fact
irregular, fast or slow, or shallow breathing
itching, rash, hives, or welts
joint or muscle pain
lack of feeling or emotion
painful or difficult urination
pale or blue lips, fingernails, or skin
pinpoint red spots on the skin
red skin lesions, often with a purple center
red, irritated eyes
seeing, hearing, or feeling things that are not there
sores, ulcers, or white spots in the mouth or on the lips
swollen glands
unusual bleeding or bruising
unusual excitement, nervousness, or restlessness
unusual tiredness or weakness
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Blurred vision
change or loss of consciousness
confusion
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
sweating
unusual drowsiness, dullness, or feeling of sluggishness
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
Aggressive
body aches or pain
decreased appetite
difficulty having a bowel movement
ear congestion
irritability
loss of voice
runny or stuffy nose
vomiting
Less common
Bladder pain
cloudy urine
cough with mucus
frequent urge to urinate
increased appetite
lower back or side pain
Incidence not known
Double vision
full or bloated feeling
headache
pressure in the stomach
red skin
swelling of the stomach area
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.
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