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Medically reviewed by Militian Inessa Mesropovna, PharmD. Last updated on 26.06.2023
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Top 20 medicines with the same components:
used to treat symptoms caused by the common cold, flu, allergies, hay fever, or other breathing illnesses (e.g., sinusitis, bronchitis). Dextromethorphan (Rynex DM) is a cough suppressant that affects a certain part of the brain (cough center), reducing the urge to cough. Decongestants help relieve stuffy nose symptoms. Antihistamines relieve watery eyes, itchy eyes/nose/throat, runny nose, and sneezing.
Brompheniramine (Rynex DM) is an antihistamine that reduces the effects of the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.
Dextromethorphan (Rynex DM) is a cough suppressant. It affects the signals in the brain that trigger cough reflex.
Phenylephrine (Rynex DM) is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).
The combination of Brompheniramine (Rynex DM), Dextromethorphan (Rynex DM), and Phenylephrine (Rynex DM) is used to treat runny or stuffy nose, sneezing, itching, watery eyes, cough, and sinus congestion caused by allergies, the common cold, or the flu.
This medicine will not treat a cough that is caused by smoking, asthma, or emphysema.
Brompheniramine (Rynex DM), Dextromethorphan (Rynex DM), and Phenylephrine (Rynex DM) may also be used for purposes not listed in this medication guide.
Usual Adult Dose for Cough and Nasal Congestion:
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 2 mg-15 mg-7.5 mg/5 mL oral liquid:
10 mL orally every 6 hours not to exceed 40 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 1 mg-5 mg-2.5 mg/5 mL oral liquid:
20 mL orally every 4 to 6 hours not to exceed 120 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 4 mg-15 mg-7.5 mg/5 mL oral liquid:
5 mL orally every 4 to 6 hours not to exceed 30 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 8 mg-20 mg-20 mg/5 mL oral suspension, extended release:
10 mL orally every 12 hours not to exceed 20 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 10 mg-30 mg-25 mg/5 mL oral suspension, extended release:
10 mL orally every 12 hours not to exceed 20 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 2 mg-10 mg-5 mg/5 mL oral liquid:
10 mL orally every 4 hours not to exceed 60 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 4 mg-20 mg-10 mg/5 mL oral liquid:
5 to 10 mL orally every 4 to 6 hours not to exceed 40 mL daily.
Usual Pediatric Dose for Cough and Nasal Congestion:
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 2 mg-15 mg-7.5 mg/5 mL oral liquid:
12 yrs or older: 10 mL orally every 6 hours not to exceed 40 mL daily.
6 yrs to 11 yrs: 5 mL orally every 6 hours not to exceed 20 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 1 mg-5 mg-2.5 mg/5 mL oral liquid:
12 yrs or older: 20 mL orally every 4 to 6 hours not to exceed 120 mL daily.
6 yrs to 11 yrs: 10 mL orally every 4 to 6 hours not to exceed 60 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 4 mg-15 mg-7.5 mg/5 mL oral liquid:
12 yrs or older: 5 mL orally every 4 to 6 hours not to exceed 30 mL daily.
6 yrs to 11 yrs: 2.5 mL orally every 4 to 6 hours not to exceed 15 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 8 mg-20 mg-20 mg/5 mL oral suspension, extended release:
12 yrs or older: 10 mL orally every 12 hours not to exceed 20 mL daily.
6 yrs to 11 yrs: 5 mL orally every 12 hours not to exceed 10 mL daily.
2 yrs to 5 yrs: 2.5 mL orally every 12 hours not to exceed 5 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 10 mg-30 mg-25 mg/5 mL oral suspension, extended release:
12 yrs or older: 10 mL orally every 12 hours not to exceed 20 mL daily.
6 yrs to 11 yrs: 5 mL orally every 12 hours not to exceed 10 mL daily.
2 yrs to 5 yrs: 2.5 mL orally every 12 hours not to exceed 5 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 2 mg-10 mg--5 mg/5 mL oral liquid:
12 yrs or older: 10 mL orally every 4 hours not to exceed 60 mL daily.
6 yrs to 11 yrs: 5 mL orally every 12 hours not to exceed 30 mL daily.
2 yrs to 5 yrs: 2.5 mL orally every 12 hours not to exceed 15 mL daily.
Brompheniramine (Rynex DM)/DM/Phenylephrine (Rynex DM) 4 mg-20 mg-10 mg/5 mL oral liquid:
12 yrs or older: 5 to 10 mL orally every 4 to 6 hours not to exceed 40 mL daily.
6 yrs to 11 yrs: 5 mL orally every 4 to 6 hours not to exceed 20 mL daily.
2 yrs to 5 yrs: 2.5 mL orally every 4 to 6 hours not to exceed 10 mL daily.
See also:
What is the most important information I should know about Rynex DM?
Patients with hypersensitivity or idiosyncrasy to any of its ingredients. Do not use in newborn infants, premature infants, in nursing mothers, in patients with severe hypertension, severe coronary artery disease, ischemic heat disease, or in those receiving monoamine oxidase (MAO) inhibitors. Antihistamines are contraindicated in patients with narrow-angle glaucoma, urinary retention, peptic ulcer, and during an asthma attack. Antihistamines should not be used to treat lower respiratory tract conditions including asthma.
Use Rynex DM as directed by your doctor. Check the label on the medicine for exact dosing instructions.
- Take Rynex DM by mouth with or without food. If stomach upset occurs, take with food to reduce stomach irritation.
- Take Rynex DM with a full glass of water (8 oz/240 mL).
- Drink plenty of water while taking Rynex DM.
- If you miss a dose of Rynex DM, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.
Ask your health care provider any questions you may have about how to use Rynex DM.
There are specific as well as general uses of a drug or medicine. A medicine can be used to prevent a disease, treat a disease over a period or cure a disease. It can also be used to treat the particular symptom of the disease. The drug use depends on the form the patient takes it. It may be more useful in injection form or sometimes in tablet form. The drug can be used for a single troubling symptom or a life-threatening condition. While some medications can be stopped after few days, some drugs need to be continued for prolonged period to get the benefit from it.Use: Labeled Indications
Cough and upper respiratory allergy symptoms: Temporary relief of symptoms (runny nose, sneezing, itchy nose or throat, itchy/watery eyes, cough due to minor throat and bronchial irritation, nasal congestion, nasal passages swelling) associated with the common cold, hay fever (allergic rhinitis), or other upper respiratory allergies.
See also:
What other drugs will affect Rynex DM?
If you are taking this medication under your doctor's direction, your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor or pharmacist first.
Taking certain MAO inhibitors with this medication may cause a serious (possibly fatal) drug interaction. Avoid taking isocarboxazid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, or tranylcypromine during treatment with this medication. Most MAO inhibitors should also not be taken for two weeks before treatment with this medication. Ask your doctor when to start or stop taking this medication.
If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting this medication. Avoid taking MAO inhibitors within 2 weeks of starting or stopping this medication.
Before using this product, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially: antihistamines applied to the skin (such as diphenhydramine cream, ointment, spray), antispasmodics (e.g., atropine, belladonna alkaloids), beta blockers (e.g., metoprolol, atenolol), drugs for Parkinson's disease (e.g., anticholinergics such as benztropine, trihexyphenidyl), guanethidine, certain inhaled anesthetics (e.g., halothane), methyldopa, reserpine, scopolamine, tricyclic antidepressants (e.g., amitriptyline, desipramine).
Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: certain antihistamines (e.g., diphenhydramine), anti-seizure drugs (e.g., carbamazepine), medicine for sleep or anxiety (e.g., alprazolam, diazepam, zolpidem), muscle relaxants, narcotic pain relievers (e.g., codeine), psychiatric medicines (e.g., chlorpromazine, risperidone, amitriptyline, trazodone).
Check the labels on all your medicines (e.g., cough-and-cold products, diet aids) because they may contain ingredients that could affect your heart rate/blood pressure or cause drowsiness. Ask your pharmacist about the safe use of those products.
This medication may interfere with certain medical/laboratory tests (including brain scan for Parkinson's disease), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.
See also:
What are the possible side effects of Rynex DM?
Drowsiness, dizziness, headache, blurred vision, upset stomach, nausea, constipation, or dry mouth/nose/throat may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.
To relieve dry mouth, suck on (sugarless) hard candy or ice chips, chew (sugarless) gum, drink water, or use a saliva substitute. This medication can dry up and thicken mucus in your lungs, making it more difficult to breathe and clear your lungs. To help prevent this effect, drink plenty of fluids unless otherwise directed by your doctor.
If your doctor has prescribed this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if any of these unlikely but serious side effects occur: mental/mood changes (e.g., confusion, hallucinations), ringing in the ears, shaking (tremors), trouble urinating, weakness.
Tell your doctor right away if any of these rare but very serious side effects occur: easy bruising/bleeding, fast/slow/irregular heartbeat, seizure.
A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.