Do not take 2 antihistamines together unless recommended by your doctor.
If a healthy adult takes only a slightly higher dose of antihistamine, such as accidentally taking two pills instead of one, their symptoms may not be serious, or they may not have any symptoms. However, a larger overdose, especially in children or older adults, may cause serious symptoms.
Can I take 2 allergy pills a day? It is important to take allergy pills and antihistamines as directed. If your allergy medications do not provide enough relief from your symptoms, do not take additional doses. Instead, reach out to your doctor to find a more effective allergy treatment plan.
What happens if I take more than one dose of Claritin®? Taking more than the recommended dose of Claritin® may cause drowsiness. In the case of overdose, get medical help or contact a Poison Control Center right away- always follow label directions.
Adults and children 12 years of age and over: Take one 180 mg tablet with water once a day; do not take more than 1 tablet in 24 hours.
On its own, Allegra only seems to cause heart rhythm problems at extremely high doses. So taking an extra dose by accident is unlikely to harm most people. But if you've taken too much Allegra and are concerned, contact your healthcare provider or Poison Control at 1-800-222-1222.
Do not take more than the dose listed on the label, as doing so can cause serious problems. If someone takes too much diphenhydramine and is hallucinating, can't be awakened, has a seizure, has trouble breathing, or has collapsed, immediately get medical attention or contact poison control at 1-800-222-1222 or online .
Adults and children 6 years of age and older—One tablet or 10 milligrams (mg) once a day. Do not take more than one tablet per day.
Taking more than the usual dose is unlikely to harm you or your child. If you take an extra dose, you might get some of the common side effects. If this happens or you're concerned, contact your doctor.
The adult Claritin 24 Hour dosage is 10 mg (1 pill) by mouth once a day. Don't take more than 1 pill in a 24-hour period. If swallowing pills is tough, there are chewable tablets for adults that have the same directions, as well as ODTs. You can also take Claritin solution if you prefer.
In general, an oral antihistamine tablet will start to work within 30 minutes and reach its maximum effect in about 2 hours. You will know when an antihistamine starts to work when it starts to relieve allergy symptoms, such as congestion, runny nose, itchy eyes or skin rash.
ZYRTEC® Allergy Dye-Free Chewables
Adults and children 6 years and older Chew and swallow 2 tablet (10 mg) once daily; do not take more than 1 tablet (10 mg) in 24 hours. A 5 mg product may be appropriate for less severe symptoms.
ZYRTEC 10 mg film-coated tablets
The maximum recommended daily dose is 20 mg, do not exceed this dose, unless told to do so by your doctor.
Although you can take some medications together to treat allergy symptoms, combining certain medications can raise the risk of serious side effects. Oral antihistamines, such as Zyrtec and Benadryl, shouldn't be taken together without a healthcare provider's OK.
take every 4 to 6 hours, or as directed by a doctor - do not exceed 6 doses in 24 hours - adults and children 12 years and over 1 to 2 capsules - children 6 to under 12 years 1 ...
You should not take Claritin and Zyrtec together. Both Claritin and Zyrtec are antihistamines, and taking these medications together can increase the risk of side effects as well as overdose. In addition, you should avoid taking Zyrtec or Claritin with alcohol or any other sedative.
take 1 tablet every 12 hours; do not take more than 2 tablets in 24 hours.
In overdose symptoms can include dizziness, tachycardia, headache drowsiness or agitation. While the current generation of lesser sedating antihistamines do not affect the QT interval at normal doses (unlike the previous generation of medicines), there are concerns there may be some effect in overdose.
If you feel like your allergy medication isn't working, talk to your healthcare provider about new allergy testing, and use an allergy tracker to help avoid triggers. You can also start your treatment before allergy season gets into full swing to help prevent symptoms from getting too serious.
Adults and children 6 years and older: The typical dose is 10 mg by mouth once per day. The maximum dose is 10 mg per day. Children 2 to under 6 years of age: The typical dose is 5 mg by mouth once per day. The maximum dose is 5 mg per day.
Common symptoms of overdosing on Claritin® may include drowsiness, headaches, and fast pounding heart rate. For any questions or concerns you may have about taking Claritin® or if someone has had more than the prescribed dosage, call the Poison Help Line at 1-800-222-1222.
The number of times you take an antihistamine each day depends on the type of antihistamine. Some antihistamines are taken every 4 to 6 hours, and some are longer-lasting antihistamines that are taken every 12 to 24 hours.
by Drugs.com
If your allergy is particularly bad then yes you can take them on the same day, as there are no known interactions. This is a therapeutic duplication and it is usually recommended to take only one antihistamine at any time, however if you have been prescribed to take both together then it is appropriate.
Cetirizine is the most potent antihistamine available and has been subjected to more clinical study than any other.
Zyrtec (cetirizine) is the strongest of the second-generation antihistamines, says Dr. Garcia-Ibáñez. And because there is less chance of toxicity with this medication, the dosage can be increased substantially, at the discretion of your doctor, he says. Zyrtec is an effective treatment for allergy symptoms and hives.