The following adverse reactions associated with other medicinal products containing fentanyl have also been reported (very common ≥ 1/ 10; common ≥ 1/ 100 to < 1/ 10; uncommon ≥ 1/ 1000 to < 1/ 100; rare ≥ 1/ 10,000 to < 1/ 1000; very rare < 1/ 10,000; not known (cannot be estimated from available data)):