Over-the-counter medicines (OTC) that quickly reduce anxiety mainly include some natural supplements and medicines, which may help relieve mild anxiety symptoms. The following are a few common over-the-counter medicines and supplements： 1. **Melatonin**: Although it is mainly used to improve sleep, melatonin may also help reduce anxiety-related sleep problems. 2. **L-theanine**: An amino acid, commonly found in green tea, is believed to help relax and reduce anxiety. 3. **Valerian root**: An herbal medicine commonly used to improve sleep and reduce anxiety. 4. **Passion flower**: An herbal medicine traditionally used to relieve anxiety and improve sleep. 5. **Magnesium**: Magnesium deficiency may be related to anxiety, and magnesium supplementation may help relieve symptoms. 6. **5-HTP**: An amino acid that may help increase serotonin levels and thereby reduce anxiety. 7. **CBD oil**: Cannabidiol (CBD) is a non-psychologically active ingredient that is believed to help reduce anxiety and stress. ### How to buy： 1. **Pharmacies**: Most pharmacies (such as CVS, Walgreens, etc.) have these over-the-counter medicines and supplements. 2. **Health food stores**: Such as GNC, Whole Foods, etc., provide a variety of natural supplements. 3. **Online stores**: Such as Amazon, iHerb, etc., provide a wide selection of over-the-counter medicines and supplements. ### Precautions： -**Consult a doctor**: Before starting to use any new supplements or medicines, it is recommended to consult a doctor or pharmacist, especially if you are taking other medicines or have a chronic disease. -**Dosage and side effects**: Follow the product instructions and pay attention to possible side effects and interactions. -**Long-term use**: If anxiety symptoms persist or worsen, it is recommended to seek professional medical help. Although these over-the-counter medicines and supplements may help relieve mild anxiety, they are not a substitute for professional treatment. If you have severe anxiety symptoms, it is recommended to seek the help of a psychiatrist or psychiatrist.