Levetiracetam Er Side Effects

The following adverse reactions are discussed in more details in other sections of labeling: • Behavioral abnormalities and Psychotic Symptoms [see Warnings and Precautions (5.1)] • Suicidal Behavior and Ideation [see Warnings and Precautions (5.2)] • Somnolence and Fatigue [see Warnings and Precautions (5.3)] • Anaphylaxis and Angioedema [see Warnings and Precautions (5.4)] • Serious Dermatological Reactions [see Warnings and Precautions (5.5)] • Coordination Difficulties [see Warnings and Precautions (5.6)] • Hematologic Abnormalities [see Warnings and Precautions (5.8)] 6.1 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.

Levetiracetam Extended-Release Tablets In the controlled clinical study in patients with partial-onset seizures [see CLINICAL STUDIES (14.1)], the most common adverse reactions in patients receiving levetiracetam extended-release tablets in combination with other AEDs, for events with rates greater than placebo, were irritability and somnolence.

Table 3 lists adverse reactions that occurred in at least 5% of epilepsy patients receiving levetiracetam extended-release tablets in the placebo-controlled study and were numerically more common than in patients treated with placebo.

In this study, either levetiracetam extended-release tablets or placebo was added to concurrent AED therapy.

Table 3: Adverse Reactions in the Placebo-Controlled, Adjunctive Study in Patients Experiencing Partial-Onset Seizures Levetiracetam Extended-Release Tablets (N=77) % Placebo (N=79) % Influenza 8 4 Somnolence 8 3 Irritability 7 0 Nasopharyngitis 7 5 Dizziness 5 3 Nausea 5 3 Discontinuation or Dose Reduction in the Levetiracetam Extended-Release Tablets Controlled Clinical Study In the controlled clinical study, 5% of patients receiving levetiracetam extended-release tablets and 3% receiving placebo discontinued as a result of an adverse reaction.

The adverse reactions that resulted in discontinuation and that occurred more frequently in levetiracetam extended-release tablets-treated patients than in placebo-treated patients were asthenia, epilepsy, mouth ulceration, rash, and respiratory failure.

Each of these adverse reactions led to discontinuation in a levetiracetam extended-release tablets-treated patient and no placebo-treated patients.

Immediate-Release Levetiracetam Tablets Table 4 lists the adverse reactions in the controlled studies of immediate-release levetiracetam tablets in adult patients experiencing partial-onset seizures [see CLINICAL STUDIES (14.2)].

Although the pattern of adverse reactions in the levetiracetam extended-release tablets study seems somewhat different from that seen in partial-onset seizure controlled studies for immediate-release levetiracetam tablets, this is possibly due to the much smaller number of patients in this study compared to the immediate-release tablet studies.

The adverse reactions for levetiracetam extended-release tablets are expected to be similar to those seen with immediate-release levetiracetam tablets.