SYMPAZAN SIDE EFFECTS

  • Generic Name: clobazam oral film
  • Brand Name: Sympazan
  • Drug Class: Anticonvulsants, Benzodiazepine,
Last updated on MDtodate: 10/13/2022

SIDE EFFECTS

Clinically significant adverse reactions that appear in other sections of the labeling include the following:

  • Risks from Concomitant Use with Opioids
  • Abuse, Misuse, and Addiction
  • Dependence and Withdrawal Reactions
  • Potentiation of Sedation from Concomitant Use with Central Nervous System Depressants
  • Somnolence or Sedation
  • Serious Dermatological Reactions
  • Suicidal Behavior and Ideation

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The following adverse events have been reported in clinical trials of patients treated with clobazam, the active ingredient of SYMPAZAN®.

During its development for the adjunctive treatment of seizures associated with LGS, clobazam was administered to 333 healthy volunteers and 300 patients with a current or prior diagnosis of LGS, including 197 patients treated for 12 months or more. The conditions and duration of exposure varied greatly and included single-and multiple-dose in healthy volunteers and two double-blind studies in patients with LGS (Study 1 and 2). Only Study 1 included a placebo group, allowing comparison of adverse reaction rates on clobazam at several doses to placebo.

Adverse Reactions Leading To Discontinuation In An LGS Placebo Controlled Clinical Trial (Study 1)

The adverse reactions associated with clobazam treatment discontinuation in ≥1% of patients in decreasing order of frequency included lethargy, somnolence, ataxia, aggression, fatigue, and insomnia.

Most Common Adverse Reactions In An LGS Placebo Controlled Clinical Trial (Study 1)

Table 1 lists the adverse reactions that occurred in ≥5% of clobazam-treated patients (at any dose), and at a rate greater than placebo-treated patients, in the randomized, double-blind, placebo-controlled, parallel group clinical study of adjunctive AED therapy for 15 weeks (Study 1).

Table 1: Adverse Reactions Reported for ≥5% of Patients and More Frequently than Placebo in Any Treatment Group

Placebo N=59 % Clobazam Dose Level All Clobazam N=179 %
Lowa N=58 % Mediumb N=62 % Highc N=59 %
Gastrointestinal Disorders
Vomiting 5 9 5 7 7
Constipation 0 2 2 10 5
Dysphagia 0 0 0 5 2
General Disorders and Administration Site Conditions
Pyrexia 3 17 10 12 13
Irritability 5 3 11 5 7
Fatigue 2 5 5 3 5
Infections and Infestations
Upper respiratory tract infection 10 10 13 14 12
Pneumonia 2 3 3 7 4
Urinary tract infection 0 2 5 5 4
Bronchitis 0 2 0 5 2
Metabolism and Nutrition Disorders
Decreased appetite 3 3 0 7 3
Increased appetite 0 2 3 5 3
Nervous System Disorders
Somnolence or Sedation 15 17 27 32 26
  Somnolence 12 16 24 25 22
  Sedation 3 2 3 9 5
Lethargy 5 10 5 15 10
Drooling 3 0 13 14 9
Ataxia 3 3 2 10 5
Psychomotor hyperactivity 3 3 3 5 4
Dysarthria 0 2 2 5 3
Psychiatric Disorders
Aggression 5 3 8 14 8
Insomnia 2 2 5 7 5
Respiratory Disorders
Cough 0 3 5 7 5
a Maximum daily dose of 5 mg for ≤30 kg body weight; 10 mg for >30 kg body weight
b Maximum daily dose of 10 mg for ≤30 kg body weight; 20 mg for >30 kg body weight
c Maximum daily dose of 20 mg for ≤30 kg body weight; 40 mg for >30 kg body weight

 

Postmarketing Experience

The following adverse reactions have been identified during post-approval use of clobazam tablets. These reactions are reported voluntarily from a population of uncertain size; therefore, it is not possible to estimate their frequency or establish a causal relationship to drug exposure. Adverse reactions are categorized by system organ class.

Blood Disorders: Anemia, eosinophilia, leukopenia, thrombocytopenia

Eye Disorders: Diplopia, vision blurred

Gastrointestinal Disorders: Abdominal distention

General Disorders and Administration Site Conditions: Hypothermia

Investigations: Hepatic enzyme increased

Musculoskeletal: Muscle spasms

Psychiatric Disorders: Agitation, anxiety, apathy, confusional state, depression, delirium, delusion, hallucination

Renal and Urinary Disorders: Urinary retention

Respiratory Disorders: Aspiration, respiratory depression

Skin and Subcutaneous Tissue Disorders: Rash, urticaria, angioedema, and facial and lip edema

 

SRC: NLM .