Antihistamines are one of the most common drugs that are used extensively in various dermatological and nondermatological conditions. The use of H-1-antihistamines during pregnancy has been very controversial due to possible teratogenic effects of these drugs. ATARAX peut provoquer une somnolence. Il importe d'en tenir compte chez les conducteurs de véhicules et les utilisateurs de machines, chez lesquels l'association à d'autres médicaments sédatifs est par ailleurs déconseillée. Si la durée de sommeil est insuffisante, le risque d'altération de la vigilance est encore accru. Atarax (hydroxyzine) reduces activity in the central nervous system. It also acts as an antihistamine that reduces the natural chemical histamine in the body. US FDA pregnancy category Not Assigned: The US FDA has amended the pregnancy labeling rule for prescription drug products to require labeling that includes a summary of risk, a discussion of the data supporting that summary, and relevant information to help health care providers make prescribing decisions and counsel women about the use of drugs during pregnancy. Pregnancy categories A, B, C. Hydroxyzine, sold under the brand names Atarax among others, is a medication of the antihistamine type. It is used in the treatment of itchiness, anxiety, and nausea, including that due to motion sickness. It is used either by mouth or injection into a muscle. How to use Atarax Tablet. Take this medication by mouth with or without food as directed by your doctor, usually three or four times daily. If you are using the liquid form of this medication. I do remember with my 3rd pregnancy I took both Tylenol and vistaril (same as atarax, an antihistamine-type drug that I was on for stress/tension), and I also had a glass of champagne on New Year's Eve. Is Hydroxyzine Safe During Pregnancy? For women who are pregnant, hydroxyzine (Atarax ®, Vistaril ®) may not be safe. This is based on limited information from the use of the medication in pregnant animals and humans. A: Atarax (hydroxyzine) reduces activity in the central nervous system and also acts as an antihistamine. Atarax is used to treat anxiety and tension, to relieve the skin symptoms of allergies, to.