If you feel anxious at the dentist, or suffer from dental phobia, please let your dentist know. There are a number of ways your dentist can assist to reduce your dental anxiety. Oral sedation is extremely safe and has been used for many years to relax anxious patients. Your dentist may prescribe you a pill to take 1 hour before your dental appointment. This medicine will greatly reduce anxiety and make dental treatment comfortable. A close friend or family will need to drive you home after the appointment. Penthrox is the newest form of anxiety relief; You may have seen it used by paramedics. Your dentist will give you a small inhaler or "green whistle" to hold up to the mouth and breath through. You will keep the inhaler in your hand throughout the appointment and inhale the gas mixture as required. Penthrox will make you very relaxed and provide pain relief. A close friend or family will need to drive you home after the appointment. Nitrous oxide, laughing gas, or happy gas is another safe and effective way of reducing dental anxiety. For more information about laughing gas please see the "Laughing gas" section.