LiverTox: Clinical and Research Information on Drug-Induced Liver Injury.National Library of Medicine MedlinePlus. These first-generation antihistamines are often used for short periods to treat or prevent: The effects of first-generation antihistamines-such as Benadryl (diphenhydramine) or Chlor-Trimeton (chlorpheniramine), among others- they may cause drowsiness or sedation so are often taken at night. Second-generation antihistamines may be used to treat long-term conditions such as: So, if you’re already using a steroid nasal spray, there’s usually no benefit to adding on an oral. Regular use of a steroid nasal spray (e.g., Flonase) is more effective than an oral antihistamine (e.g., Zyrtec). But this doesn’t always provide more allergy relief for everyone. ZYRTEC Allergy Relief Tablets Children under 6 years of age Ask a doctor Adults under 65 and children 6 years and older One 10 mg tablet once daily do not take more than one 10 mg tablet in 24 hours. Example of second-generation antihistamine are: You can take Flonase and Zyrtec (cetirizine) together. Consumers with liver or kidney disease Ask a doctor. If you take an antihistamine frequently or daily, your health care provider may recommend a second-generation antihistamine as they are less likely to cause side effects like sleepiness and fatigue. You may take an antihistamine every day to keep long-term allergy symptoms under control. This is when you know you are going to encounter something that sets off your allergies, so you take your antihistamines as a preventative before you are exposed to the allergan that triggers your allergy. After that period of time, you should see your doctor and be evaluated for what is causing your symptoms. Zyrtec does not appear to interact with many drugs (theophylline slightly decreased the clearance of Zyrtec). Zyrtec-D is considered safe for most individuals to take on a daily basis for one to two weeks. May be given daily on a regular basis when allergens are most prevalent (such as during spring or summer). 5mg may be appropriate for less severe symptoms. Occasional use to prevent symptoms when you know your allergy triggers. The dosage for adults and children over the age of 6 is one 10mg tablet once daily. When you have an allergy that you only have occasionally you can take the antihistamine just when needed, once you have the symptoms. Some antihistamines are taken every 4 to 6 hours, and some are longer-lasting antihistamines that are taken every 12 to 24 hours.Ĭonsult the drug label and ask your health care provider how long and how often you should take an antihistamine. The number of times you take an antihistamine each day depends on the type of antihistamine. Zyrtec (cetirizine HCL) is an antihistamine that comes in standard capsule, tablet, gelcap, liquid and dissolvable tablet form. Yes, most people can take antihistamines every day, if they have daily symptoms of their allergies.
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