how many milligrams of antihistamine can you take at one time?
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Adults—1 to 2 milligrams (mg) every eight to twelve hours as needed. Children 12 years of age and older—0.5 mg to 1 mg two times a day as needed. Children 4 to 12 years of age—Use and dose must be determined by your doctor. Children and infants up to 4 years of age—Use is not recommended .
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Most allergy medicines should not be combined with one another, according to Dr. Susan Besser, a primary care provider at Mercy Medical Center in Baltimore, Maryland. “You should not take multiple oral antihistamines together, such as Benadryl, Claritin, Zyrtec, Allegra or Xyzal.
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Adults—5 or 20 milligrams (mg) three times a day. Each dose should be taken about 4 to 6 hours apart. Children—Use and dose must be determined by your doctor.
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Diphenhydramine (Benadryl): 1mg per pound (one 25mg tablet for a 25lb dog) twice daily. Cetirizine (Zyrtec) ¼ - ½ mg per pound (one 10mg tab per 30-40 lbs) twice daily.
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Recommended doses of fexofenadine are: For adults with seasonal allergic rhinitis (hay fever): 120 mg taken once a day. For children aged 6-12 years with seasonal allergic rhinitis (hay fever): 30 mg taken twice a day, in the morning and evening. For adults with chronic urticaria: 180 mg taken once a day.
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Answer. Claritin (loratadine) is a second-generation antihistamine and is most commonly dosed as 10 mg once daily (every 24 hours). However, it is also available in 5 mg dosage forms, which can be taken twice daily (every 12 hours). So, overall, any Claritin product that is 10 mg should only be taken once a day.
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Benadryl Dosage If you are using Benadryl liquid, do not use a kitchen teaspoon to measure a dose. Use the measuring cup that comes with the medication. Typical doses for Benadryl are: For adults and children older than 12, take 1 to 2 tablets or capsules every 4 to 6 hours as needed.
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Allergic rhinitis Diphenhydramine hydrochloride: 25mg to 50 mg up to every four to six hours as needed. Maximum 300 mg/day.
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Adults—2000 milligrams (mg) every 12 hours for one day. Children 12 years of age and above—2000 milligrams (mg) every 12 hours for one day. Children below 12 years of age—Use and dose must be determined by your doctor.
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For adults, acetaminophen can be taken 4 to 6 times throughout the day as long as the total amount taken is not more than 3,000 mg for the whole day. Under the supervision of a prescriber, up to 4,000 mg a day of acetaminophen can be taken.
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Hay fever and allergies - diphenhydramine comes as 25mg and 50mg tablets. The usual dose is 25mg or 50mg, taken 3 or 4 times a day. Try to space your doses evenly throughout the day. Insect bites, stings and eczema - diphenhydramine comes as a cream which you use once or twice a day.
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Adults—1 to 2 milligrams (mg) every eight to twelve hours as needed. Children 12 years of age and older—0.5 mg to 1 mg two times a day as needed. Children 4 to 12 years of age—Use and dose must be determined by your doctor.
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It's usual to take cetirizine once a day. Children sometimes take it twice a day. Cetirizine is classed as a non-drowsy antihistamine, but some people still find it makes them feel quite sleepy.
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Zyrtec (cetirizine) or Claritin (loratadine) can be given once to twice daily. The adult tablets are both 10mg. Dogs under 10 pounds should get no more than 5mg, or ½ of a tablet. Those weighing 10-50 pounds should get 10mg, and heavy dogs (over 50 pounds) can take up to 20mg.
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To relieve the symptoms of an allergic reaction: Adults—50 to 100 milligrams (mg) 4 times a day. Children 6 years of age and older—50 to 100 mg per day, divided in small doses. Children younger than 6 years of age—50 mg per day, divided in small doses.
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Take this medication by mouth with or without food, usually every 4 to 6 hours, as directed by the product package or by your doctor. Do not take more than 4 doses in a day.
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Zyrtec (cetirizine) or Claritin (loratadine) can be given once to twice daily. The adult tablets are both 10mg. Dogs under 10 pounds should get no more than 5mg, or ½ of a tablet.