The nurse has given a client taking ethambutol information about the medication. The nurse determines that the client understands the instructions if the client states to report which occurrence...

The nurse has given a client taking ethambutol information about the medication. The nurse determines that the client understands the instructions if the client states to report which occurrence immediately?

1. Impaired sense of hearing 2. Problems with visual acuity 3. Gastrointestinal (GI) side effects 4. Red-orange discoloration of body secretions