Which health teaching concept should be included in the instructions for a client taking echinacea?.

Which health teaching concept should be included in the
instructions for a client taking echinacea?

1. Dosage can be doubled if symptoms fail to resolve in 48
hours. 2. Limit fluid intake while taking this supplement. 3. Take the smallest
amount possible when starting herbal therapy. 4. Allergic reactions are not
possible with natural supplements.