Yes. It is ideal for you to avoid eating and/or drinking caffeinated drinks (tea/coffee etc) for at least 1 hour before your treatment. You should not consume alcohol or drugs prior to treatment. Your treatment may be refused if we feel that you are intoxicated or under the influence of alcohol or drugs.
If possible, it is also best to avoid stressful situations before your treatment, so that you arrived feeling calm and relaxed at the clinic, although, after most treatments, you will certainly feel more relaxed than when you arrived.