Alka-Seltzer Plus Cold & Cough Medicine Liqui-Gels (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Alka-Seltzer Plus Night-Time Cold Medicine Liqui-Gels (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Doxylamine Succinate, and Pseudoephedrine Hydrochloride), Alka-Seltzer Plus Flu Medicine Liqui-Gels (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Allfen DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Ambifed-G DM (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Amerituss AD (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Phenylephrine Hydrochloride), Anaplex DM Cough Syrup (as a combination product containing Dextromethorphan Hydrobromide, Brompheniramine Maleate, and Pseudoephedrine Hydrochloride), Andehist-DM Syrup (as a combination product containing Dextromethorphan Hydrobromide, Brompheniramine Maleate, and Pseudoephedrine Hydrochloride), Benylin Adult Formula Cough Suppressant, Benylin Cough Suppresant/Expectorant (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Benylin Pediatric Cough Suppressant, Bromadine-DM Syrup (as a combination product containing Dextromethorphan Hydrobromide, Brompheniramine Maleate, and Pseudoephedrine Hydrochloride), Bromfed DM Cough Syrup (as a combination product containing Dextromethorphan Hydrobromide, Brompheniramine Maleate, and Pseudoephedrine Hydrochloride), Cardec DM Drops (as a combination product containing Dextromethorphan Hydrobromide, Carbinoxamine Maleate, and Pseudoephedrine Hydrochloride), Cardec DM Syrup (as a combination product containing Dextromethorphan Hydrobromide, Carbinoxamine Maleate, and Pseudoephedrine Hydrochloride), Cheracol D Cough Formula (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Codal-DM Syrup (as a combination product containing Dextromethorphan Hydrobromide, Phenylephrine Hydrochloride, and Pyrilamine Maleate), Codimal DM Syrup (as a combination product containing Dextromethorphan Hydrobromide, Phenylephrine Hydrochloride, and Pyrilamine Maleate), Comtrex Cold & Cough Multi-Symptom Relief Maximum Strength Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Comtrex Cold & Cough Multi-Symptom Relief Maximum Strength Tablets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Comtrex Cough & Cold Day-Night Maximum Strength Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Comtrex Deep Chest Cold Multi-Symptom Softgels (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Guaifenesin, and Pseudoephedrine Hydrochloride), Comtrex Non-Drowsy Maximum Strength Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Contac Day & Night Cold/Flu Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Contac Severe Cold and Flu Maximum Strength Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Contac Severe Cold and Flu Non-Drowsy Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Coricidin HBP Flu Maximum Strength (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Chlorpheniramine Maleate), Coricidn HBP Cough & Cold (as a combination product containing Dextromethorphan Hydrobromide and Chlorpheniramine Maleate), Cough-X (as a combination product containing Dextromethorphan Hydrobromide and Benzocaine), Cydec-DM Drops (as a combination product containing Dextromethorphan Hydrobromide, Carbinoxamine Maleate, and Pseudoephedrine Hydrochloride), Cydec-DM Syrup (as a combination product containing Dextromethorphan Hydrobromide, Carbinoxamine Maleate, and Pseudoephedrine Hydrochloride), Delsym, Diabetic Choice Phanatuss DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin, Diabetic Tussin) Children's (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Diabetic Tussin DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Diabetic Tussin DM Maximum Strength Cough Suppressant/Expectorant (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Dimetapp Cold & Congestion Caplets (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Dimetapp Nighttime Flu Children's (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Brompheniramine Maleate, and Pseudoephedrine Hydrochloride), Dimetapp Non-Drowsy Flu Children's (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), DimetappDM Cold & Cough Elixir (as a combination product containing Dextromethorphan Hydrobromide, Brompheniramine Maleate, and Pseudoephedrine Hydrochloride), Donatussin Syrup (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, Guaifenesin, and Phenylephrine Hydrochloride), Duratuss DM Elixir (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Fenesin DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Gani-Tuss DM NR (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Guaifenesin DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Guaifenex DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Guaifenex-Rx DM 14-Day Treatment Regimen (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Guiatuss DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Hold DM, Humibid DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Hydro-Tussin DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Kidkare Cough & Cold Liquid (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Maxifed-DM (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephredrine Hydrochloride), Muco-Fen 1000 DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Muco-Fen DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), PediaCare Cough-Cold Chewables (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Pediacare Long-Acting Cough Plus Cold (as a combination product containing Dextromethorphan Hydrobromide and Pseudoephedrine Hydrochloride), PediaCare Multisymptom Cold Liquid (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), PediaCare NightRest Cough-Cold Formula (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Pertussin DM Extra Strength, Phenergan with Dextromethorphan Syrup (as a combination product containing Dextromethorphan Hydrobromide and Promethazine Hydrochloride), Profen Forte DM (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Profen II DM (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), ProfenII DM (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Prometh with Dextromethorphan Hydrobromide Cough Syrup (as a combination product containing Dextromethorphan Hydrobromide and Promethazine Hydrochloride), Protuss-DM (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Rescon-DM (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Robitussin Multi-Symptom Cold & Flu Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Guaifenesin, and Pseudoephedrine Hydrochloride), Robitussin Night Relief (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Pseudoephedrine Hydrochloride, and Pyrilamine Maleate), Robitussin Allergy & Cough (as a combination product containing Dextromethorphan Hydrobromide, Brompheniramine Maleate, and Pseudoephedrine Hydrochloride), Robitussin Cold & Congestion Caplets (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Robitussin Cold & Congestion Softgels (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Robitussin Cold Multi-Symptom Cold & Flu Softgels (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Guaifenesin, and Pseudoephedrine Hydrochloride), Robitussin Cough & Cold Maximum Strength (as a combination product containing Dextromethorphan Hydrobromide and Pseudoephedrine Hydrochloride), Robitussin Cough & Cold Pediatric (as a combination product containing Dextromethorphan Hydrobromide and Pseudoephedrine Hydrochloride), Robitussin CoughGels, Robitussin Flu (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Robitussin Honey Cough Suppressant, Robitussin Maximum Strength Cough Suppressant, Robitussin Multi-Symptom Honey Flu (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Robitussin Nighttime Honey Flu (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Robitussin Pediatric Cough Suppressant, Robitussin PM Cough & Cold (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Robitussin Sugar Free Cough (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Robitussin-DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Robitussin-CF (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Rondec DM (as a combination product containing Dextromethorphan Hydrobromide, Brompheniramine Maleate, and Pseudoephedrine Hydrochloride), Rondec DM Drops (as a combination product containing Dextromethorphan Hydrobromide, Carbinoxamine Maleate, and Pseudoephedrine Hydrochloride), Safe Tussin 30 (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Safe Tussin (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Simply Cough, SINUtuss DM (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Phenylephrine Hydrochloride), Sucrets 8 Hour Cough Suppressant, Sudafed Cold & Cough Children's (as a combination product containing Dextromethorphan Hydrobromide and Pseudoephedrine Hydrochloride), Sudafed Cold & Cough Liquid Caps (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Guaifenesin, and Pseudoephedrine Hydrochloride), Sudafed Severe Cold Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Sudafed Severe Cold Tablets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Su-Tuss DM Elixir (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), TheraFlu Cold & Cough Night Time Hot Liquid Regular Strength (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), TheraFlu Flu & Congestion Maximum Strength Non-Drowsy Hot Liquid (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), TheraFlu Night Time Flu & Cough Maximum Strength Hot Liquid (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), TheraFlu Night Time Severe Cold & Congestion Night Time Maximum Strength Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), TheraFlu Severe Cold & Congestion Maximum Strength Hot Liquid (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), TheraFlu Severe Cold & Congestion Non-Drowsy Maximum Strength Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), TheraFlu Severe Cold & Congestion, Non-Drowsy Maximum Strength Hot Liquid (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Guaifenesin, and Pseudoephedrine Hydrochloride), Touro CC Caplets (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Touro DM Caplets (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Triaminic Cold & Cough (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Triaminic Cold & Cough Softchews (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Triaminic Cold & Night Time Cough (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Triaminic Cough & Congestion Formula (as a combination product containing Dextromethorphan Hydrobromide and Pseudoephedrine Hydrochloride), Triaminic Cough & Sore Throat Softchews (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Triaminic Cough (as a combination product containing Dextromethorphan Hydrobromide and Pseudoephedrine Hydrochloride), Triaminic Cough Softchews, Triaminic Flu, Cough & Fever (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), TriaminicCough and Sore Throat (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Tussafed-EX Drops (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Phenylephrine Hydrochloride), Tussafed-EX Syrup (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Tussafed-LA Caplets (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Pseudoephedrine Hydrochloride), Tuss-DM (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Tussex Cough Syrup (as a combination product containing Dextromethorphan Hydrobromide, Guaifenesin, and Phenylephrine Hydrochloride), Tussi-Organidin DM NR (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Tussi-Organidin DM-S NR (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Tylenol Cold Day Non-Drowsy Multi-Symptom Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Tylenol Cold Day Non-Drowsy Multi-Symptom Gelcaps (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Tylenol Cold Multi-Symptom Severe Congestion Non-Drowsy Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Guaifenesin, and Pseudoephedrine Hydrochloride), Tylenol Cold Night Time Multi-Symptom Complete Formula Caplets (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Tylenol Cold Plus Cold & Cough Children's (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Tylenol Cold Plus Cough Children's (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Tylenol Cough Medication with Decongestant Multi-Symptom (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Tylenol Flu Day Non- Drowsy Maximum Strength Gelcaps (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Tylenol Flu NightTime Maximum Strength (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Doxylamine Succinate, and Pseudoephedrine Hydrochloride), Tylenol Plus Cold & Cough Multi Symptom Children's (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Tylenol Plus Flu Children's (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Vicks 44 Cough Relief, Vicks 44D Cough & Head Congestion Relief (as a combination product containing Dextromethorphan Hydrobromide and Pseudoephedrine Hydrochloride), Vicks 44E Cough & Chest Congestion Relief (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Vicks 44e Pediatric Cough & Chest Congestion Relief (as a combination product containing Dextromethorphan Hydrobromide and Guaifenesin), Vicks 44m Cough & Cold Relief Pediatric (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Vicks 44M Cough Cold & Flu Relief (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Vicks DayQuil Multi-Symptom Cold/Flu Relief (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Vicks DayQuil Multi-Symptom Cold/Flu Relief LiquiCaps (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, and Pseudoephedrine Hydrochloride), Vicks NyQuil Cold/Cough Relief Children's (as a combination product containing Dextromethorphan Hydrobromide, Chlorpheniramine Maleate, and Pseudoephedrine Hydrochloride), Vicks NyQuil Cough (as a combination product containing Dextromethorphan Hydrobromide and Doxylamine Succinate), Vicks NyQuil Multi-Symptom Cold/Flu Relief (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Doxylamine Succinate, and Pseudoephedrine Hydrochloride), Vicks NyQuil Multi-Symptom Cold/Flu Relief LiquiCaps (as a combination product containing Dextromethorphan Hydrobromide, Acetaminophen, Doxylamine Succinate, and Pseudoephedrine Hydrochloride),  DM

Dextromethorphan is used to temporarily relieve a cough caused by a cold, the flu, or other conditions in adults and children over age 2. Dextromethorphan should not be given to children younger than 2 years old because it may cause serious or life-threatening side effects in young children. Dextromethorphan should be used carefully in children who are 2-11 years old. Dextromethorphan will relieve a cough but will not treat the cause of the cough or speed recovery. Dextromethorphan is in a class of medications called antitussives. It works by decreasing the activity in the part of the brain causes coughing.

Dextromethorphan comes as a liquid-filled capsule, a chewable tablet, a dissolving strip, a solution (liquid), an extended-release (long-acting) suspension (liquid), and a lozenge to take by mouth. It is usually taken every 4-12 hours as needed. Check the package information for the product you plan to use to find your dose and how often you should take the medication. Follow the directions on the package or prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand.

Dextromethorphan should only be used according to the label or package directions. Do not take more than the recommended amount of dextromethorphan in a 24-hour period. Refer to the package or prescription label to determine the amount contained in each dose. Taking dextromethorphan in large amounts can cause serious side effects or death.

Dextromethorphan comes alone and in combination with antihistamines, cough suppressants, and decongestants. Ask your doctor or pharmacist for advice on which product is best for your symptoms. Check nonprescription cough and cold product labels carefully before using two or more products at the same time. These products may contain the same active ingredient(s) and taking them together could cause you to receive an overdose. This is especially important if you will be giving cough and cold medications to a child.

Stop taking dextromethorphan and call your doctor if your cough does not get better within 7 days, if your cough goes away and comes back , or if your cough occurs with a fever, rash, or headache.

If you are using the dissolving strips, place them on your tongue and swallow after they melt.

If you are taking the chewable tablets you can allow them to melt in your mouth or you can chew them before swallowing.

If you are taking the extended-release suspension, shake the bottle well before each use to mix the medication evenly.

If you are taking the liquid, do not use a household spoon to measure your dose. Use the measuring spoon or cup that came with the medication or use a spoon made especially for measuring medication.

If you are taking the lozenges, allow them to slowly melt in your mouth.

Dextromethorphan may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• dizziness
• lightheadedness
• drowsiness
• nervousness
• restlessness
• nausea
• vomiting
• stomach pain

If you experience any of the following symptoms, call your doctor immediately:

• rash

Dextromethorphan may cause other side effects. Call your doctor if you experience any unusual problems while you are taking this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at http://www.fda.gov/MedWatch/index.html] or by phone [1-800-332-1088].

• tell your doctor and pharmacist if you are allergic to dextromethorphan, any other medications, or any of the ingredients in the product you plan to take. Check the package label for a list of the ingredients.
• do not take dextromethorphan if you are taking a monoamine oxidase (MAO) inhibitor, such as isocarboxazid (Marplan), phenelzine (Nardil), selegiline (Eldepryl, Emsam, Zelapar), and tranylcypromine (Parnate), or if you have stopped taking an MAO inhibitor within the past 2 weeks.
• tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take.
• tell your doctor if you smoke, if you have a cough that occurs with a large amount of phlegm (mucus) or if you have or have ever had breathing problems such as asthma, emphysema, or chronic bronchitis.
• tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking dextromethorphan, call your doctor.
• if you have phenylketonuria (PKU, an inherited condition in which a special diet must be followed to prevent mental retardation), you should know that some brands of chewable tablets that contain dextromethorphan may be sweetened with aspartame, a source of phenylalanine.

Unless your doctor tells you otherwise, continue your normal diet.

Dextromethorphan is usually taken as needed. If your doctor has told you to take dextromethorphan regularly, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

Symptoms of overdose may include:

• nausea
• vomiting
• drowsiness
• dizziness
• unsteadiness
• changes in vision
• difficulty breathing
• fast heartbeat
• hallucinating (seeing things or hearing voices that do not exist)
• seizures
• coma (loss of consciousness for a period of time)

Ask your pharmacist any questions you have about dextromethorphan.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.