There is some overlap between the terms "sedative" and "hypnotic".Advances in pharmacology have permitted more specific targeting of receptors, and greater selectivity of agents, which necessitates greater precision when describing these agents and their effects: Doctors often administer sedatives to patients in order to dull the patient's anxiety related to painful or anxiety-provoking procedures.They both calm your immune system’s reaction to allergens. They also take effect at different times and stay effective for different durations. Antihistamines have a reputation of making you sleepy because the first types crossed into your central nervous system more easily and had a direct effect on your alertness.These factors could determine which of these two drugs is better for you. However, newer antihistamines like Zyrtec and Claritin are less likely to cause this side effect. Most people experience at least 24 hours of relief after a single dose. People who take it may feel relief in as little as one hour.Among the most popular over-the-counter (OTC) allergy meds are Zyrtec and Claritin.
"In some studies we reviewed, some people actually experienced more sedation with the newer, nonsedating formulas than with the older, sedating products.Antihistamines like Zyrtec and Claritin are designed to calm the histamine reaction your body has when it’s exposed to an allergen.When your body encounters something it’s allergic to, it sends out white blood cells and goes into fight mode. This substance causes many of the symptoms of an allergic reaction.Antihistamines genrally come as tablets, creams, ointments and eye drops to reduce conditions such as watering, itchy eyes, running, itchy nose, sneezing, swelling and irritation of the eys, and to reduce hives, nettle rash and other allergic reactions.Antihistamines work by blocking the action of histamine which the body produces as part of its natural defences.Development in the syllabus of Pharmaceutical Marketing & Management that is studied in the Bachelor of Pharmacy course of Bangladeshi Universities.