When used occasionally, discontinue use after 10 days. When used regularly, discontinue use in 3-week cycles. Not recommended for immune-compromised individuals. If you are lactose intolerant, have kidney disease, or are diabetic, consult your healthcare provider before using this product. Use with caution if you have ragweed allergy. If pregnant or breast-feeding, consult a health professional before use. Keep out of reach of children. Do not purchase if safety seal ring in closure is broken or missing.