During a clinic appointment, a client prescribed medication for glaucoma reports vision problems. When taking a medication history, which of the following herbal preparations should the nurse identify as being problematic for this client?
1. Ginseng
2. Echinacea
3. Valerian
4. St. John's wort
Correct Answer: 1
Rationale 1: Ginseng may interact with caffeine and cause irritability and may also decrease the effectiveness of glaucoma medication.
Rationale 2: Echinacea may reduce the effectiveness of immunosuppressants but does not appear to affect glaucoma medication.
Rationale 3: Valerian may increase the sedative effects of antianxiety medication but does not appear to affect glaucoma medication.
Rationale 4: St. John's wort may potentiate antidepressant medications, causing severe agitation, nausea, confusion, and possible cardiac problems.
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