Dextromethorphan and zyrtec

Drugs.com provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. Data sources include Micromedex (updated 1 Apr 2024), Cerner Multum™ (updated 21 Apr 2024), ASHP (updated 10 Apr 2024) and others.

Dextromethorphan and zyrtec. Applies to: Delsym 12 Hour Cough Relief (dextromethorphan) Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with dextromethorphan.

Dextromethorphan/bupropion (Auvelity) for depression. Dextromethorphan/bupropion (Auvelity) for depression. Dextromethorphan/bupropion (Auvelity) for depression Med Lett Drugs Ther. 2022 Dec 26;64(1666):201-203. PMID: 36542346 No abstract available. Keywords ...

Sinus headache, facial pain, or fever: Try analgesics, such as Tylenol (acetaminophen), or nonsteroidal anti-inflammatory medications (NSAIDs), such as Motrin or Advil (ibuprofen) or Aleve (naproxen). Sneezing, runny nose, cough, postnasal drip: Try an antihistamine, such as Benadryl (diphenhydramine), Claritin (loratadine), or Zyrtec …In search of an oral alternative to ketamine with fewer side effects, Iosifescu and his group turned to dextromethorphan—a chemical most known for its cough suppressant properties. The issue with dextromethorphan is that while it is a strong inhibitor of the NMDA receptor, it is quickly metabolized, Iosifescu noted.• Allegra-D , Claritin-D , Zyrtec-D due to their effect on blood pressure. • Combination (multi-symptom) cold, sinus, and flu products. It is better to treat each symptom separately. ... • The cough suppressant dextromethorphan (Delsym DM , Vicks Nyquil Cough Liquid ). • Coricidin Cold & Cough can help with a dry cough.Zyrtec (cetirizine) Robitussin Cough + Chest Congestion DM alcohol/food interactions There is 1 alcohol/food interaction with Robitussin Cough + Chest Congestion DM (dextromethorphan / guaifenesin).Drugs.com provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. Data sources include Micromedex (updated 1 Apr 2024), Cerner Multum™ (updated 21 Apr 2024), ASHP (updated 10 Apr 2024) and others.

The study uses data from the FDA. It is based on dextromethorphan hydrobromide; promethazine hydrochloride and cetirizine hydrochloride (the active ingredients of Promethazine dm and Zyrtec, respectively), and Promethazine dm and Zyrtec (the brand names). Other drugs that have the same active ingredients (e.g. generic drugs) are not …use alternative or monitor serotonin syndrome sx, especially during initiation/titration: combo may incr. risk of serotonin syndrome (additive effects) escitalopram. dextromethorphan (generic) Find medical information for dextromethorphan on epocrates online, including its dosing, contraindications, drug interactions, and pill pictures.He's answered thousands of medication and pharmacy-related questions and he's ready to answer yours! [email protected]. In our latest question and answer, the pharmacist discusses cold medications that should be avoided, and which are considered safe, with the SSRI Prozac.Cough medicines for adults include cough suppressants, expectorants, and multi-symptom cough formula. Dextromethorphan is the suppressant used in OTC remedies that acts on the brain to suppress the cough reflex. Guaifenesin is the OTC expectorant that thins mucus so you can cough it up.Abstract. Dextromethorphan (DM) is a commonly used antitussive and is currently the only FDA-approved pharmaceutical treatment for pseudobulbar affect. Its safety profile and diverse pharmacologic actions in the central nervous system have stimulated new interest for repurposing it. Numerous preclinical investigations and many open-label or ...dextromethorphan and L-tryptophan both increase serotonin levels. Modify Therapy/Monitor Closely. letermovir. letermovir increases levels of dextromethorphan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. lithium. dextromethorphan and lithium both increase serotonin levels. Modify Therapy/Monitor Closely. loxapineQuinidine prevents the metabolism of dextromethorphan into its active metabolite dextrorphan, which is a much more potent NMDA receptor antagonist but much less potent serotonin reuptake inhibitor than dextromethorphan. The mechanism of action of dextromethorphan/quinidine in the treatment of PBA is unknown. Research

Dextromethorphan is an over-the-counter (OTC) cough reliever used in adults and some children. Learn about side effects, dosage, and more.Methods and analysis A randomised, double-blind, add-on, placebo-controlled, group sequential design clinical trial will be conducted on patients with MDD who will be randomly assigned to the control and the test group in a 1:1 ratio. Patients in the test group will get dextromethorphan 30 mg once daily, whereas patients in the control group will receive a placebo once daily as an add-on to ...Dextromethorphan is a drug used in many over-the-counter cough and cold medicines for its antitussive effects. It comes in oral strips, lozenges, liquids, or liquid-filled capsules and formulations often combine the drug with guaifenesin, acetaminophen, and pseudoephedrine. Dextromethorphan is also …Dextromethorphan is a cough suppressant found in several cold medications. Several U.S. states have begun regulating who, and under what circumstances, can purchase dextromethorphan containing products. Not all states have regulations documented at this time, but this article contains all the states that have documentation.Uses. This combination medication is used to relieve coughs caused by the common cold, bronchitis, and other breathing illnesses. Guaifenesin belongs to a class of drugs known as expectorants. It ...

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Dextromethorphan can increase serotonin levels in the body and has the potential of causing serotonin syndrome when used with other medications that affect serotonin. ... Antihistamines (e.g. Claritin, Zyrtec) are generally considered OK and safe to use. They can help with a variety of cold symptoms such as a runny nose and itchy, watery eyes ...Dextromethorphan is a cough suppressant. Promethazine is an antihistamine. Dextromethorphan and promethazine is a combination medicine used to treat cough, stuffy nose, runny nose, and sneezing ...These products are not intended to diagnose, treat, cure or prevent any disease. Use as Directed. Browse the Robitussin website today to find out which product is right for you. Robitussin cough medicine effectively shuts cough down for children and adults.Dextromethorphan. Dextromethorphan is a cough suppressant included in a variety of over-the-counter cough/cold products including Delsym and DayQuil. There are no known interactions between prednisone and dextromethorphan. ... Zyrtec (cetirizine) Allegra (fexofenadine) Xyzal (levocetirizine) Benadryl (diphenhydramine) Final Words.Jan 14, 2019 · However, pseudoephedrine and dextromethorphan can also lower the seizure threshold and are common ingredients in many cold medications. Guaifenesin does not seem to be as much of a problem. Some people are also sensitive to antihistamines, so we suggest that you avoid diphenhydramine (Benadryl) and cetirizine (Zyrtec).

Possible side effects of antitussives. Side effects of antitussives depend on the type a person uses. Codeine can cause several side effects, including: constipation. pruritus or itchy skin ...Some cough and cold medications — including oral decongestants and certain pain relievers — can increase blood pressure. Cough medications like Mucinex (guaifenesin) and dextromethorphan (Delsym, Robitussin), and antihistamines like diphenhydramine (Benadryl) aren't known to increase blood pressure. If you have existing high blood pressure ...Dextromethorphan (Delsym, Robitussin) and acetaminophen (Tylenol) are generally safe for pregnancy. See a comprehensive list of cold medications you can take (and ones you should avoid) while pregnant. ... (Zyrtec) and loratadine (Claritin) Newer antihistamines, such as cetirizine (Zyrtec) and loratadine (Claritin), are less likely to cause ...Every 20 mL of Robitussin Maximum Strength Cough and Chest Congestion DM ("maximum strength Robitussin DM") liquid contains: 20 mg of dextromethorphan. 400 mg of guaifenesin. The adult dosage of maximum strength Robitussin DM liquid is 20 mL by mouth every 4 hours. Don't take more than 6 doses (120 mL) in 24 hours.Extended-release tablets. Regular strength (Mucinex DM and generic): Each tablet contains 600 mg of guaifenesin and 30 mg of dextromethorphan. People 12 years and older: The typical dose is 1 or 2 tablets by mouth every 12 hours. Don't take more than 4 tablets in a 24-hour period. Children under age 12: Don't use.Antihistamine and decongestant combinations are used to treat the nasal congestion (stuffy nose), sneezing, and runny nose caused by colds and hay fever. Antihistamines work by preventing the effects of a substance called histamine, which is produced by the body. Histamine can cause itching, sneezing, runny nose, and watery eyes.Children's Zyrtec. Children's Mucinex Cough contains two ingredients: Dextromethorphan. Guaifenesin. Children's Zyrtec contains one: Cetirizine. All three of these drugs are considered to be safe together. There is no known interaction between them. Therefore, in this case, you should be fine giving Children's Zyrtec with Children's … Find patient medical information for dextromethorphan polistirex oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Key points. It is important to be aware of serious drug interactions between Lexapro and over-the-counter cough and cold medicine. In general, antihistamines, acetaminophen, guaifenesin, and zinc/Vitamin C are considered safe to use with Lexapro (although antihistamines can increase the risk of dry mouth and dry eyes).Dextromethorphan/quinidine is indicated for the treatment of pseudobulbar affect (PBA) and has shown efficacy in patients with underlying ALS and MS. Dextromethorphan's mechanism of action in treating PBA is not known. Quinidine is an antiarrhythmic agent that, when combined with dextromethorphan, results in an elevated dextromethorphan level

Nyquil Cold and Flu contains an analgesic (acetaminophen), a cough suppressant (dextromethorphan), and an antihistamine (doxylamine), which can be found in many other over-the-counter products. Using more than one medication containing acetaminophen, dextromethorphan, doxylamine, can lead to an accidental overdose and cause serious side effects.

Acetaminophen / dextromethorphan / guaifenesin / phenylephrine is in the drug class upper respiratory combinations. Acetaminophen / dextromethorphan / guaifenesin / phenylephrine is used to treat the following conditions: Cold Symptoms; Influenza; Zyrtec. A total of 256 drugs are known to interact with Zyrtec.Objectives: To compare the effects of a single nocturnal dose of buckwheat honey or honey-flavored dextromethorphan (DM) with no treatment on nocturnal cough and sleep difficulty associated with childhood upper respiratory tract infections. Design: A survey was administered to parents on 2 consecutive days, first on the day of presentation when no medication had been given the prior evening ...How they work. The active ingredient in Robitussin and Mucinex DM products, dextromethorphan, is an antitussive, or cough suppressant. It stops your urge to cough and helps reduce coughing caused ...Because of a lack of good evidence that cold and cough medicines help -- and a very small risk of serious side effects -- the FDA said in 2008 that toddlers and babies shouldn't get these ...Pseudoephedrine is a popular decongestant found in medications such as Sudafed®,. Allegra D® and Zyrtec D®. ... Dextromethorphan is another ingredient found in ...Typical dosing for Nyquil Cough (dextromethorphan / doxylamine) Each 30 mL (2 tablespoons) of liquid solution contains 30 mg of dextromethorphan and 12.5 mg of doxylamine. Adults and children 12 years and older: The typical dose is 30 mL (2 tablespoons) by mouth every 6 hours. Don't take more than 120 mL (8 tablespoons) in 24 hours.dextromethorphan food. Applies to: Tylenol Cold & Flu Severe (acetaminophen / dextromethorphan / guaifenesin / phenylephrine) Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment.

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Applies to: Tylenol Children’s Cold + Flu (acetaminophen / chlorpheniramine / dextromethorphan / phenylephrine) and Children's Zyrtec (cetirizine) Using cetirizine together with chlorpheniramine may increase side effects such as dizziness, drowsiness, and difficulty concentrating. Some people, especially the elderly, may also experience ... Zyrtec is a second-generation antihistamine and NyQuil is an OTC formulation containing multiple active ingredients (1,2). NyQuil contains three active ingredients: Acetaminophen, Dextromethorphan, and Doxylamine. Of these, Acetaminophen and Dextromethorphan can generally be safely taken with Zyrtec on the same day without significant interactions.These include antihistamines (e.g. Claritin, Zyrtec), acetaminophen, and guaifenesin (generic for Mucinex). ... Dextromethorphan (Delsym) Caution should be taken when using Adderall and dextromethorphan together due to the small, but serious, risk of serotonin syndrome.Zyrtec (Cetirizine) It is notably not metabolized by the cytochrome P450 system. Best option. It can be yes-drowsy for some people though, so experience it before without DXM just in case. ... Yeah, I recommend you to check dextromethorphan wikipedia page, Pharmacology -> Pharmacokinetics. The text explains a lot, and there is a great chart.Objective: Altered glutamatergic neurotransmission has been implicated in the pathogenesis of depression. This trial evaluated the efficacy and safety of AXS-05 (dextromethorphan-bupropion), an oral N-methyl-D-aspartate (NMDA) receptor antagonist and σ 1 receptor agonist, in the treatment of major depressive disorder (MDD).. Methods: This double-blind, phase 3 trial, was conducted between ...Applies to: Vicks NyQuil Severe Cold & Flu (acetaminophen / dextromethorphan / doxylamine / phenylephrine) and Zyrtec (cetirizine) Using cetirizine together with doxylamine may increase side effects such as dizziness, drowsiness, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking ...Jan 13, 2013 ... I went to the doc and they prescribed a syrup (hydrocodone Clorphen) as an antihistamine and cough suppressant and a z pack. The side ...Using dextromethorphan together with diphenhydrAMINE may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination.Mar 19, 2024 · What Is DXM? Dextromethorphan (DXM or DM) is a cough suppressant and opioid derivative used in more than 100 over-the-counter medicines. Dextromethorphan is safe for ingestion and not habit-forming when taken as directed; however, illicit and excessive use of DXM has recently risen, and this type of use has negative effects. CHEMICAL NAME. DXM is a widely available over-the-counter cough suppressant. When taken far above its standard medical dosage, it is a strong dissociative used primarily by teens. Many DXM-containing products (such as Coricidin Cough and Cold) also contain other active ingredients which can be dangerous or fatal in high doses. ….

Robitussin DM is a cough medicine for treating your cold or flu. Here’s what you need to know, including how it works, the forms it comes in, as well as side effects, interactions, and warnings. Find patient medical information for dextromethorphan polistirex oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Dextromethorphan can increase serotonin levels in the body and has the potential of causing serotonin syndrome when used with other medications that affect serotonin. ... Antihistamines (e.g. Claritin, Zyrtec) are generally considered OK and safe to use. They can help with a variety of cold symptoms such as a runny nose and itchy, …cetirizine food. Applies to: Zyrtec (cetirizine) Alcohol can increase the nervous system side effects of cetirizine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with cetirizine.Dextromethorphan received FDA approval in 1958 for its use as a cough suppressant. It is one of the most common compounds found in most over-the-counter antitussives for the past 50 years. In 2010, the FDA approved the use of dextromethorphan for pseudobulbar affect in combination with quinidine. This activity will highlight the mechanism of action, adverse event profile, approved and off ... Find patient medical information for chlorpheniramine-dextromethorphan oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. CHEMICAL NAME. DXM is a widely available over-the-counter cough suppressant. When taken far above its standard medical dosage, it is a strong dissociative used primarily by teens. Many DXM-containing products (such as Coricidin Cough and Cold) also contain other active ingredients which can be dangerous or fatal in high doses.Zyrtec is a second-generation antihistamine and NyQuil is an OTC formulation containing multiple active ingredients (1,2). NyQuil contains three active ingredients: Acetaminophen, Dextromethorphan, and Doxylamine. Of these, Acetaminophen and Dextromethorphan can generally be safely taken with Zyrtec on the same day without significant interactions.Dextromethorphan plus ultra low-dose quinidine reduces pseudobulbar affect. Ann Neurol. 2010;68(5):693-702. doi: 10.1002/ana.22093. 30. Dubovsky SL. Dextromethorphan/quinidine for pseudobulbar affect. Dextromethorphan and zyrtec, Applies to: Coricidin HBP Maximum Strength Flu (acetaminophen / chlorpheniramine / dextromethorphan) and Zyrtec (cetirizine) Using cetirizine together with chlorpheniramine may increase side effects such as dizziness, drowsiness, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking ..., Vicks DayQuil is an over-the-counter combination medication product used for the temporary relief of common cold and flu symptoms. DayQuil is available in several formulations. DayQuil was introduced in 1974 under the name "DayCare" and is currently advertised for daytime use because of its non-drowsy active ingredients.The brand name was reintroduced as "DayQuil" in 1992., Zyrtec-D can also cause these additional side effects: increased heart rate. feeling jittery. not feeling tired at bedtime. Zyrtec or Zyrtec-D can also cause serious side effects. Call your child ..., Other second-generation antihistamines that can be used as well include Zyrtec (cetirizine), Xyzal (levocetirizine), and Allegra (fexofenadine). ... The risk of serotonin syndrome with combining Prozac and dextromethorphan is thought to be low, but the combination should be avoided if there are other alternative options for you. Natural cough ..., Dextromethorphan (Delsym, Robitussin) and acetaminophen (Tylenol) are generally safe for pregnancy. See a comprehensive list of cold medications you can take (and ones you should avoid) while pregnant. ... (Zyrtec) and loratadine (Claritin) Newer antihistamines, such as cetirizine (Zyrtec) and loratadine (Claritin), are less likely to cause ..., Pediatric nurses are available 24/7 at 720-777-0123. When to Use. Treatment of bad coughs. Dextromethorphan (DM) is present in most cough syrups. Table Notes: Age Limits. Don't use under 4 years of age (FDA recommendation 2008). Over 4 years of age, not advised as first treatment of cough., Download this free debt snowball worksheet that will tell you exactly how many months until you are debt free once you fill it out. The Debt Snowball, made famous for being part of..., Patient GG depicted by @MerryRoseHowley (check her out she is a YouTuber)Watch @HemeReview in-depth video: https://youtu.be/oP_mJmWrfTQPsychiatrist insight p..., Dextromethorphan, or DXM for short, is an ingredient that works in the brain and central nervous system to target signals that trigger the cough reflex and ultimately help reduce the urge to cough. DXM is the main ingredient in over-the-counter (OTC) cough products such as Robitussin 12 Hour, a powerful dry-cough-relief medicine., Brompheniramine-dextromethorphan-pseudoephedrine (Bromfed DM) is an oral syrup. It's used to treat upper respiratory symptoms caused by allergies or the common cold, such as nasal congestion., Dextromethorphan, the most widely used cough suppressant in the U.S.A., was compared with codeine, the traditional European antitussive, in a double-blind, crossover trial using both an objective and subjective assessment of efficacy in sixteen patients with chronic, stable cough. Both preparations, at a dose of 20 mg, were similarly effective ..., chlorpheniramine cetirizine. Applies to: Coricidin HBP Cough & Cold (chlorpheniramine / dextromethorphan) and Zyrtec (cetirizine) Using cetirizine together with chlorpheniramine may increase side effects such as dizziness, drowsiness, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking ..., Objectives: Identify the mechanism of action of dextromethorphan. Outline the approved and other indications for therapy with dextromethorphan. Review the adverse event profile for …, Antidepressants and dextromethorphan or pseudoephedrine. It's generally considered safe to take antidepressants while taking cold medicine. "However, cold/flu medications that contain dextromethorphan may increase the risk of a rare side effect called serotonin syndrome when taken with SSRIs and SNRIs," Dr. Carter says., Dextromethorphan is indicated in combination with brompheniramine and pseudoephedrine in the treatment of coughs and upper respiratory symptoms …, Antihistamines (loratadine, diphenhydramine, brompheniramine, chlorpheniramine, cetirizine). •. Components of cold medicines (pseudoephedrine, dextromethorphan)., Robitussin DM is a cough medicine for treating your cold or flu. Here's what you need to know, including how it works, the forms it comes in, as well as side effects, interactions, and warnings., Sinus headache, facial pain, or fever: Try analgesics, such as Tylenol (acetaminophen), or nonsteroidal anti-inflammatory medications (NSAIDs), such as Motrin or Advil (ibuprofen) or Aleve (naproxen). Sneezing, runny nose, cough, postnasal drip: Try an antihistamine, such as Benadryl (diphenhydramine), Claritin (loratadine), or Zyrtec …, Using dextromethorphan together with diphenhydrAMINE may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination., brompheniramine cetirizine. Applies to: Bromfed DM (brompheniramine / dextromethorphan / pseudoephedrine) and Zyrtec (cetirizine) Using cetirizine together with brompheniramine may increase side effects such as dizziness, drowsiness, and difficulty concentrating., These include antihistamines (e.g. Claritin, Zyrtec), acetaminophen, and guaifenesin (generic for Mucinex). ... Dextromethorphan (Delsym) Caution should be taken when using Adderall and dextromethorphan together due to the small, but serious, risk of serotonin syndrome., Dextromethorphan Pregnancy Warnings. Anti-tussive use during pregnancy has not been reported to increase the risk of teratogenic effects. However, there are no controlled data in human pregnancy. AU TGA pregnancy category A: Drugs which have been taken by a large number of pregnant women and women of childbearing age without any proven increase ..., Chlorpheniramine and dextromethorphan side effects. Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.. Stop using chlorpheniramine and dextromethorphan and call your doctor at once if you have severe drowsiness.. Side effects such as dry …, Drug class: Antitussives. Medically reviewed by Kaci Durbin, MD. Last updated on Feb 23, 2024. Uses. Warnings. Before taking. Dosage. Side effects. Interactions. FAQ. What is dextromethorphan? Dextromethorphan is a cough suppressant. It affects the signals in the brain that trigger cough reflex. Dextromethorphan is used to treat a cough., Side Effects. Slight drowsiness/ dizziness, nausea, or vomiting may occur. Rarely, some people may experience severe drowsiness/dizziness with normal doses. If any of these effects last or get ..., Related/similar drugs Bromfed DM, brompheniramine / dextromethorphan / pseudoephedrine, Mucinex D, Vicks Dayquil Cold & Flu Relief, Vanacof Brompheniramine, Pseudoephedrine, Dextromethorpan Syrup - Clinical Pharmacology. Brompheniramine maleate is a histamine antagonist, specifically an H1-receptor-blocking agent belonging to the alkylamine class of antihistamines., Side Effects. Slight drowsiness/ dizziness, nausea, or vomiting may occur. Rarely, some people may experience severe drowsiness/dizziness with normal doses. If any of these effects last or get ..., Can Zyrtec-D be taken with Mucinex DM (Dextromethorphan HBr 20 mg; Guaifenesin 400 mg)? Answer. Yes, …, Dogs And Dextromethorphan. Remember that Robitussin is a cough suppressant. While it won't cure a cold, Dextromethorphan does suppress cough reflex signals. Speaking of Dextromethorphan, it is the active ingredient in Robitussin that's safest for dogs. But even then, Robitussin is for short-term use only., Gabapentin, dextromethorphan, MK-801 or drug combinations were injected with increasing doses. Mechanical response thresholds were tested with von Frey hairs to graded mechanical touch/pressure, and ethyl chloride spray was applied to assess the cold sensitivity before and after injuries. Results In spinally injured rats, gabapentin and ..., Chlorpheniramine, dextromethorphan, and phenylephrine is a combination medicine used to treat cough, runny or stuffy nose, sneezing, itching, and watery eyes caused by allergies, the common cold ..., Extended-release tablets. Regular strength (Mucinex DM and generic): Each tablet contains 600 mg of guaifenesin and 30 mg of dextromethorphan. People 12 years and older: The typical dose is 1 or 2 tablets by mouth every 12 hours. Don't take more than 4 tablets in a 24-hour period. Children under age 12: Don't use., cetirizine food. Applies to: Zyrtec (cetirizine) Alcohol can increase the nervous system side effects of cetirizine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with cetirizine.