* Flu * Cough * Hoarseness * Throat infection * Bronchitis * Allergies * Skin infections * Rheumatism * Weight loss What caution to take. * If you are pregnant you should be careful using this herb. Children under one year of age and people suffering from liver disease should not use guaco. If you are on treatment with anticoagulant medicine, you should also avoid the guaco. Overuse, or prolonged use, can also affect health, including bleeding, increased heart rate, vomiting, and diarrhea.