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.
For oral dosage forms (capsules, tablets, or liquid): Adults—25 to 100 milligrams (mg) three or four times a day as needed. Children 6 years of age and older—12.5 to 25 mg every six hours as needed. Children 4 to 6 years of age—12.5 mg every six hours as needed.
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.
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. See individual product pages for label directions.
Can you take Zyrtec and Claritin the same day? While you shouldn't take Zyrtec and Claritin at the same time, you may be able to take Zyrtec and Claritin on the same day, depending on when you took your last dose. For instance, Claritin comes in both 12-hour and 24-hour tablets.
by Drugs.com
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. If you do experience any odd symptoms please see your doctor.
Official answer. Cetirizine can be taken at any time of the day. In most people it is non-sedating, so they take it in the morning. However, a percentage of people do find it to be sedating so if it does make you drowsy it is best to take it in the evening.
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. Children younger than 6 years of age—Use and dose must be determined by your doctor.
#2: You Aren't Consistent With Your Medication
Take one Claritin every day for it to be the most effective, but don't take more than one pill a day, even if you missed a pill the day before. Taking multiple pills a day increases your risk of serious side effects.
The adult Claritin 12 Hour dosage is 5 mg (1 tablet) dissolved on the tongue every 12 hours. Don't take more than 2 tablets in a 24-hour period.
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.
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.
take 1 tablet every 12 hours; do not take more than 2 tablets in 24 hours.
If you take too much ZYRTEC you may be more likely to have side effects such as: confusion, diarrhoea, dizziness, tiredness, headache, malaise, dilating of pupil, itching, restlessness, sedation, somnolence (feeling drowsy), stupor, abnormal rapid heart rate, tremor, urinary retention.
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 .
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 have seasonal allergies and notice that your allergy medicine stops working, it might be because you've developed new allergies. People rarely develop a tolerance to allergy medications. Common medications like Zyrtec, Allegra, Flonase, and Claritin don't usually stop working.
Why do antihistamines stop working? Antihistamines can stop working because your allergies might be getting worse or you might have immune system changes due to aging. You also might not be taking the medication as directed. If you take an antihistamine after being exposed to an allergy trigger, it won't work as well.
“Zyrtec is found to be more potent, or stronger, in laboratory studies, compared with Claritin,” says Dr. Kung. “It also reaches a higher concentration in the skin, which can be more helpful for skin-related allergies. However, Zyrtec has a greater chance of making you sleepy while taking it.”
Loratadine is generally very safe. If you or your child take too much, it is unlikely to harm you.
Best in the evening: Allergy meds
Once-daily antihistamines, such as Claritin, reach their peak eight to 12 hours after you take them, so using them at dinnertime or before bed means better control of morning symptoms.
Sometimes, despite aggressive allergy treatment, nasal congestion persists. It's possible that the culprit is sinusitis. Sinusitis, not to be confused with rhinitis, is characterized by inflammation of the nasal passages and sinuses. Swelling can cause sinus drainage passages to become blocked and mucus to accumulate.
For many people with allergies, symptoms are the worst around 4 a.m. to 6 a.m. Taking an antihistamine at bedtime may help you or your child feel better in the morning during allergy season.
Many allergy medications, such as Zyrtec, are recommended every 24 hours. By taking the medication before bedtime you're more likely to get through the night without the active ingredients wearing off or becoming less effective closer to the end of the 24 hour period.