Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in clinical trials of a drug cannot be directly compared to rates of adverse reactions in clinical trials of another drug and may not reflect the rates observed in clinical practice.
KEDRAB was evaluated in three single-center, controlled clinical trials in adults. Subjects in these clinical studies of KEDRAB were healthy adults, primarily white, and ranged in age from 18 to 72 years. A total of 160 adult subjects were treated in these three studies, including 91 subjects who received single intramuscular doses of KEDRAB (20 IU/kg) with or without rabies vaccine.
Table 2summarizes adverse reactions occurring in >3% of adult subjects in the clinical trials of KEDRAB. (
Table 2).
Table 2: Adverse Reactions Occurring in >3% of Subjects in All Combined Studies in Adults |
| All KEDRAB
(N=91)
| All Comparator HRIG
(N=84)
| Saline Placebo+Vaccine
(N=8)
|
| Injection site pain
| 30 (33%) | 26 (31%) | 2 (25%) |
| Headache
| 14 (15%) | 11 (13%) | 3 (38%) |
| Muscle pain
| 8 (9%) | 6 (7%) | 0 (0%) |
| Joint Pain
| 5 (6%) | 0 (0%) | 1 (13%) |
| Dizziness
| 5 (6%) | 3 (4%) | 0 (0%) |
| Fatigue
| 5 (6%) | 2 (2%) | 0 (0%) |
| Abdominal pain
| 4 (4%) | 1 (1%) | 0 (0%) |
| Blood in urine (Hematuria)
| 4 (4%) | 2 (2%) | 0 (0%) |
| Nausea
| 4 (4%) | 3 (4%) | 0 (0%) |
| Feeling faint
| 4 (4%) | 1 (1%) | 0 (0%) |
Less frequent adverse reactions (≤3%) in adult subjects were diarrhea, vomiting, decreased appetite, musculoskeletal stiffness, malaise, weakness (asthenia), fainting (syncope), itching (pruritis), tingling sensation (paresthesia), rash, sunburn and elevation in liver function.
KEDRAB was also evaluated in a two-center, open-label clinical trial in 30 pediatric patients exposed or possibly exposed to rabies virus. They ranged in age from 0.5 to 14.9 years. Study treatment included a single dose of KEDRAB (20 IU/kg) and active rabies vaccine on Days 0, 3, 7 and 14 administered as per ACIP
1recommendations for rabies post-exposure prophylaxis.
Twelve pediatric patients (40%) experienced adverse reactions within 14 days of receipt of KEDRAB and first dose of rabies vaccine. There were no serious adverse reactions.
Table 3summarizes the adverse reactions that occurred in >5% of patients in the pediatric clinical trial within 14 days of receipt of KEDRAB and the first dose of the rabies vaccine.
Table 3: Adverse Reactions Occurring in >5% of Pediatric Patients within 14 Days of Post-exposure Prophylaxis with KEDRAB and Active Rabies Vaccine |
| KEDRAB + Rabies Vaccine N = 30 |
| Injection site pain
| 8 (27%) |
| Headache | 4 (13%) |
| Fever (Pyrexia)
| 4 (13%) |
| Pain in extremity
| 3 (10%) |
| Bruising (hematoma)
| 2 (7%) |
| Fatigue | 2 (7%) |
| Vomiting
| 2 (7%) |
Less common adverse reactions (≤5%) in pediatric patients were injection site redness (erythema), injection site swelling (edema), muscle pain, oral pain, and wound complication.
Insomnia was reported as a less common adverse reactions (<5%) in pediatric patients occurring after 14 days of administration.