They come in different forms, including tablets, capsules, liquids, nasal sprays, and eyedrops. Others you can buy over the counter (OTC) at your local pharmacy.Prescription antihistamines include: Older ones tend to cause more side effects, particularly drowsiness.Antihistamines are a class of agents that block histamine release from histamine-1 receptors and are used to treat the symptoms of an allergic reaction, such as edema (swelling), itch, inflammation (redness), sneezing, or a runny nose or watery eyes.Antihistamines can be further divided into those unlikely to cause drowsiness (non-sedating antihistamines) or those likely to cause drowsiness (sedating antihistamines).Histamine is a substance produced by the body as part of its defence mechanisms.It is stored in cells called mast cells, in almost all tissues of the body.I'm not sure how the dosing would be, but I can't imagine taking that much of it in the morning/daytime because it's so sedating. Today, I informed my dermatologist and he told me to double the Xyzal tablets, one tablet 5mg in the morning and one tablet 5mg at bed time. The allergist said stay on the Benadryl, but also take daily loratadine (10mg), Xyzal (levocitirizine, 5mg), Singulair(Montelukast Sodium, 10 mg), the prednisone, and Zantac to calm the stomach from the drugs and it also has an antihistamine in it, and use the albuterol inhaler when needed.I am ready to ask my doctor about other options - Xyzal, Atarax (I do have a quickly dimishing number of these pills from when I had to go to the emergency room), and perhaps dapsone. Right now, i'm sitting here feeling so itchy (better than last night, but not good) and discouraged. HE TOLD ME TO WAIT TILL MONDAY AND IF THE PROBLEM PERSISTS THEN HE WILL GIVE ME A CAUSTIC LIQUID. but what my doctor says and what actually happens might not be the same ;) They pre-medicate you for Rush day with prednisone (60mg! ), singulair(10mg) and give you an epi-pen..one day before and 2 days after..your regular allegy/asthma meds. And to gradually reduce the Benadryl (which is mind numbing).
Antihistamines for Hay Fever (Allergic Rhinitis)Newer oral antihistamines, such as Xyzal (levocetirizine), Zyrtec (cetirizine), Allegra (fexofenadine), Clarinex (desloratadine) and Clarinex (loratadine), are very effective therapies for the treatment of hay fever.Topical antihistamine creams, present in many forms of over-the-counter anti-itch creams, should not be used for the treatment of hives or other skin allergies.Placing topical antihistamines on the skin, such as Benadryl cream, can cause contact dermatitis due to the antihistamine.Antihistamines for Hives (Urticaria)Oral antihistamines are the main treatment for hives.Newer, low-sedating antihistamines, such as Zyrtec or Claritin, are preferred over the older, sedating antihistamines such as Benadryl or Atarax.Antihistamines are used in the treatment of allergic reactions, colds, hay fever, hives, and insect bites and stings.Some antihistamines may also be helpful in reducing anxiety, inducing sleep, or at preventing or treating motion sickness.These medicines work well to relieve symptoms of different types of allergies, including seasonal (hay fever), indoor, and food allergies. To treat nasal congestion, your doctor may recommend a decongestant.Some medicines combine an antihistamine and decongestant.Levocetirizine is also available without a brand name, ie as the generic medicine.Levocetirizine works by preventing the actions of histamine.