diphenhydrAMINE/hydrocodone/phenylephrine (generic name)
Dytan-HC (brand name)
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What is this medicine?DIPHENHYDRAMINE; HYDROCODONE; PHENYLEPHRINE (dye fen HYE dra meen; hye droe KOE done; fen il EF rin) is a combination of an antihistamine, a cough suppressant, and a decongestant. It is used to treat the symptoms of the common cold, and of sinus and other upper respiratory tract infections. This medicine will help with a cough, and congestion in the nose or ears. This medicine will not treat an infection.
What should I tell my health care provider before I take this medicine?They need to know if you have any of these conditions:
- drug abuse or addiction
- heart disease
- high blood pressure
- stomach ulcer
- taken an MAOI like Carbex, Eldepryl, Marplan, Nardil, or Parnate in last 14 days
- thyroid disease
- trouble passing urine
- an unusual or allergic reaction to diphenhydramine, hydrocodone, phenylephrine, other medicines, foods, dyes, or preservatives
- pregnant or trying to get pregnant
How should I use this medicine?Take this medicine by mouth. Follow the directions on the prescription label. Use a specially marked spoon or container to measure each dose. Ask your pharmacist if you do not have one. Household spoons are not accurate. Take your medicine at regular intervals. Do not take it more often than directed.
Talk to your pediatrician regarding the use of this medicine in children. This medicine is not approved for use in children less than 6 years old.
Patients over 65 years old may have a stronger reaction and need a smaller dose.
What if I miss a dose?If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
What may interact with this medicine?Do not take this medicine with any of the following medications:
- ergot alkaloids like dihydroergotamine, ergonovine, ergotamine, methylergonovine
- MAOIs like Carbex, Eldepryl, Marplan, Nardil, and Parnate
- stimulant medicines like dextroamphetamine and others
This medicine may also interact with the following medications:
- antihistamines for allergy, cough and cold
- barbiturates like phenobarbital
- certain medicines for sleep
- medicines for depression, anxiety, or psychotic disturbances
- medicines for urinary problems
- muscle relaxants
- narcotic medicines (opiates) for pain
- some heart medicines like atenolol, propranolol
- some medicines for sleep during surgery
- St. John's Wort
What should I watch for while using this medicine?You may develop tolerance to this medicine if you take it for a long time. Tolerance means that you will get less cough relief with time. Tell your doctor or health care professional if your symptoms do not improve or if they get worse.
Do not suddenly stop taking your medicine because you may develop a severe reaction. Your body becomes used to the medicine. This does NOT mean you are addicted. Addiction is a behavior related to getting and using a drug for a non-medical reason. If your doctor wants you to stop the medicine, the dose will be slowly lowered over time to avoid any side effects.
This medicine may cause dry eyes and blurred vision. If you wear contact lenses you may feel some discomfort. Lubricating drops may help. See your eye doctor if the problem does not go away or is severe.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
This medicine will cause constipation. Try to have a bowel movement at least every 2 to 3 days. If you do not have a bowel movement for 3 days, call your doctor or health care professional.