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Dextromethorphan

What is dextromethorphan

Dextromethorphan is a cough suppressant. It suppresses the area in the brain that causes coughing.

Dextromethorphan is used to treat a cough.

Dextromethorphan may also be used for purposes other than those listed in this medication guide.

General medical information about dextromethorphan

Do not use dextromethorphan to control a cough that is associated with smoking, asthma, or emphesyma, or a cough that is productive (produces sputum or phlegm). These types of coughs are necessary for normal lung function and should not be suppressed.

Use dextromethorphan only under the supervision of a doctor if you also have nausea, vomiting, a high fever, a rash, or a persistent headache.

What you should find out before taking dextromethorphan

Do not take dextromethorphan if you have taken a monoamine oxidase inhibitor (MAOI) such as isocarboxazid (Marplan), phenelzine (Nardil), or tranylcypromine (Parnate) in the last 14 days. A very dangerous drug interaction could occur, leading to serious side effects.

Do not use dextromethorphan to control a cough that is associated with smoking, asthma, or emphesyma, or a cough that is productive (produces sputum or phlegm). These types of coughs are necessary for normal lung function and should not be suppressed.

Use dextromethorphan only under the supervision of a doctor if you also have nausea, vomiting, a high fever, a rash, or a persistent headache.

It is not known whether dextromethorphan will harm an unborn baby. Do not take dextromethorphan without first talking to your doctor if you are pregnant.

It is also not known whether dextromethorphan passes into breast milk. Do not take dextromethorphan without first talking to your doctor if you are breast-feeding a baby.

How should take dextromethorphan

Take dextromethorphan exactly as directed. If you do not understand these directions, ask your pharmacist, nurse, or doctor to explain them to you.

Allow the lozenges to dissolve in your mouth.

To ensure that you get a correct dose, measure the liquid form of dextromethorphan with a special dose-measuring spoon or cup, not with a regular tablespoon. If you do not have a dose-measuring device, ask your pharmacist where you can get one.

The maximum amount of dextromethorphan lozenges, liquid, or syrup that an adult should take in 24 hours is 120 mg. Children 6 to 12 years of age should not take more than 60 mg in 24 hours. Children 2 to 6 years of age should not take more than 30 mg in 24 hours. Children younger than 2 years of age should use dextromethorphan only under the direction of a doctor.

Store dextromethorphan at room temperature away from moisture and heat.

If you miss a dose:

Take the missed dose as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take only your next regularly scheduled dose. Do not take a double dose of this medication.

What happens if you overdose:

Seek emergency medical attention.

Symptoms of a dextromethorphan overdose include slurred speech, restlessness, a feeling of poor coordination, difficulty breathing, and seizures.

Avoid while taking dextromethorphan

Use caution when driving, operating machinery, or performing other hazardous activities. Dextromethorphan may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities.

Possible side effects of dextromethorphan

No serious side effects are expected from dextromethorphan therapy. Stop taking dextromethorphan and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives).

What other drugs will affect dextromethorphan

Do not take dextromethorphan if you have taken a monoamine oxidase inhibitor (MAOI) such as isocarboxazid (Marplan), phenelzine (Nardil), or tranylcypromine (Parnate) in the last 14 days. A very dangerous drug interaction could occur, leading to serious side effects.

Do not take any other prescription or over-the-counter medications for coughs, colds, or allergies, unless your doctor or pharmacist approve it. Many other preparations contain dextromethorphan or other similar drugs and you may accidently overdose.

Drugs other than those listed here may also interact with dextromethorphan. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.

All prescription drugs:

A
abilify accupril accutane acetaminophen aciphex actifed actonel actos acyclovir adalat adderall adipex advair advil albuterol alesse aleve allegra allopurinol amaryl ambien amiodarone amitriptyline amoxicillin amoxil amphetamine anacin aprazolam aricept asacol aspirin atenolol ativan atorvastatin atrovent augmentin avandia avapro avastin avelox azmacort
B
baclofen
bactrim bactroban baycol benadryl bextra biaxin boniva bontril buspar buspirone
C
caduet campral camptosar capoten captopril cardizem cardura carisoprodol casodex catapress cefzil celebrex celexa cellcept cephalexin cialis cipro ciprodex clarinex claritin climara clindamycin clonazepam clonidine codeine codeprex combivent combivir concerta copaxone coreg coricidin cotrim coumadin cozaar crestor cubicin cyclobenzaprine cymbalta
D
darvocet demerol depakote desogen detrol dextromethorphan diazepam diclofenac didrex diflucan digoxin dilantin diltiazem dimetapp diovan diprivan ditropan doxazosin doxycycline drixoral duragesic dyazide
E
effexor elavil elocon eloxatin emend enalapril enbrel endocet engerix-b entex epogen epzicom erbitux ertaczo ery-tab erythromycin estradiol evista 
F
fabrazyme famotidine fazaclo fenofibrate fioricet fiorinal flexeril flomax flonase flovent fluoxetine fosamax fosrenol furosemide  
G
gabapentin gamimune gemfibrozil gemzar glipizide glucophage glucotrol glucovance glyburide glyburide guaifenesin guaifenex 
H
herceptin humalog humira hydroxyzine hyzaar  
I
ibuprofen imdur imitrex imodium inderal insulin integrilin iressa 
K
kaletra keflex kenalog keppra ketek klonopin kytril  
L
lamictal lamisil lanoxin lantus lasix lescol levaquin levitra levothyroxine levoxyl lexapro lidoderm lipitor lisinopril lithium lorazepam lortab lotensin lotrel lotrisone lovenox lupron luveris  
M
macrobid magnevist meclizine medroxyprogesterone meridia metformin methadone methamphetamine methotrexate methylphenidate methylprednisolone metoclopramide metoprolol metronidazole miacalcin minocycline mobic monopril morphine motrin myfortic  
N
naproxen nasacort nasonex natrecor neulasta neupogen neurontin nexium nifedipine nitrofurantoin norco nortriptyline norvasc  
O
omeprazole omnicef orthovisc oxybutynin oxycodone oxycontin oxytrol  
P
paraplatin patanol paxil pegasys penicillin pepcid percocet percodan percogesic phendimetrazine phenergan phentermine phenytoin plavix plendil potassium pravachol prednisone premarin prempro prevacid prilosec prinivil procrit promethazine propecia propofol propoxyphene propranolol protonix proventil provigil prozac pseudoephedrine pulmicort  
R
ranitidine rebetol reglan relafen relpax remeron remicade renagel renova rhinocort riomet risperdal risperidone ritalin rituxan rocephin rogaine roxicet  
S
sanctura seasonale sensipar serevent seroquel serzone singulair skelaxin soma somavert sonata spiriva spironolactone strattera striant sustiva synagis synthroid 
T
tamoxifen tavist taxol taxotere tegretol temazepam tenormin tenuate tequin terazosin tetracycline tiazac tindamax titralac tobradex topamax toprol tramadol trazodone triamcinolone triaminic triamterene tricor trileptal trimox triphasil trizivir truvada tylenol 
U
ultane ultracet ultram uroxatral
V
valium valtrex vaniqa vasotec velcade verapamil viagra vicodin vicoprofen vidaza viracept viread vytorin  
W
warfarin wellbutrin  
X
xalatan xanax xenical xifaxan xolair xopenex xyrem  
Y
yasmin 
Z
zanaflex zantac zavesca zelnorm zemplar zerit zestoretic zestril zetia ziac zithromax zocor zofran zoladex zoloft zometa zorbtive zosyn zovirax zyrtec zyvox