• Frequencies of the observed side effects are defined as: • very common: affects more than 1 user in 10 • common: affects 1 to 10 users in 100 • uncommon: affects 1 to 10 users in 1,000 • rare: affects 1 to 10 users in 10,000 • very rare: affects less than 1 user in 10,000 • not known: frequency cannot be estimated from the available data