is this bad? Medication can lose it's effectiveness past expiration date, but I would not expect it to not be effective at all; especially if only 18 months expire sudafed,but not zyrtec and allegra (fexofenadine) together-only 1 or the other. Older dd, 12 yrs old and 100 lbs, takes one Zyrtec (actually generic) every night for her allergy (she's basically allergic to her own sweat). There have been reports of patients taking 15-18 times the recommended dose of Zyrtec (recommended dose is 10 mg) and having some adverse effects (restlessness, irritability, somnolence).. Educational text answers on HealthTap are not intended for individual diagnosis, treatment or prescription. The side effects of Zyrtec (and all antihistamines) include: The most commonside effect is sleepiness (often referred to as somnolence). This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. Do not give more than 5 mL in 24 hours. Hi there. With a master's degree in scientific communication and more than 20 years of professional experience, Altobelli has worked with physicians, lawyers, veterinarians and architects to develop content for professional symposia and such publications as "Annals of Internal Medicine," "Journal of Trauma" and "Clinical Infectious Diseases. The prescribing information for Zyrtec notes two cases studies in which an overdose was observed in an adult and pediatric patient: The package insert for Zyrtec goes on to say the following regarding overdose: Although most case studies report minimal side effects in regard to overdosing with Zyrtec, it is important to note that someindividuals may be more susceptible to side effects than others. Accidentally took two doses of zyrtec and singulair. Ad Yousician Works with Any Piano and on Any Device. There is no tolerance for the antihistaminic effect of Zyrtec. Piggybacking on this. How many Cetirizine can you take in a day? | Prescription Doctor I can't believe I accidentally took two antihistamines. Even if it's the Rx dose, it's a one-time thing, I wouldn't worry. // Leaf Group Lifestyle. I don't think one will hurt. Are there any side effects I should be aware of? There have been reports of patients taking 15-18 times the recommended dose of Zyrtec (recommended dose is 10 mg) and having some adverse effects (restlessness, irritability, somnolence). should i be worried? HealthTap uses cookies to enhance your site experience and for analytics and advertising purposes. By There are people that are prescribed zyrtec (cetirizine) up to four times a day for various conditions.

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