What is Alahist DHC?
Dihydrocodeine is a narcotic cough suppressant.
Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).
The combination of dihydrocodeine and phenylephrine is used to treat cough and nasal congestion caused by the common cold.
Dihydrocodeine will not treat a cough that is caused by smoking, asthma, or emphysema.
Dihydrocodeine and phenylephrine may also be used for other purposes not listed in this medication guide.
What is the most important information I should know about Alahist DHC?
Do not use this medication if you have used an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine (Parnate) within the past 14 days. Serious, life-threatening side effects can occur if you take a cough and cold medicine before the MAO inhibitor has cleared from your body.
You should not use dihydrocodeine and phenylephrine if you are allergic to it, or if you have severe or uncontrolled high blood pressure, severe coronary artery disease, narrow-angle glaucoma, peptic ulcer or a bowel obstruction called paralytic ileus, if you are unable to urinate, if you are pregnant, or if you are having an asthma attack.
Before taking this medication, tell your doctor if you have heart disease or high blood pressure, ischemic heart disease (reduced circulation of blood to the heart), asthma or other breathing disorder, diabetes, glaucoma, a thyroid disorder, Addison’s disease or other adrenal gland disorder, head injury or brain tumor, kidney or liver disease, gallbladder disease, pancreatitis, a seizure disorder, an enlarged prostate, problems with urination, mental illness, or a history of drug or alcohol addiction.
Always ask a doctor before giving cough or cold medicine to a child. Death can occur from the misuse of cough or cold medicine in very young children. Dihydrocodeine and phenylephrine should not be given to a child younger than 6 years old.
What should I discuss with my healthcare provider before taking Alahist DHC?
Do not use this medication if you have used an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine (Parnate) within the past 14 days. Serious, life-threatening side effects can occur if you take a cough and cold medicine before the MAO inhibitor has cleared from your body.
You should not use dihydrocodeine and phenylephrine if you have ever had an allergic reaction to it, or if you have:
- severe or uncontrolled high blood pressure
- severe coronary artery disease
- narrow-angle glaucoma
- peptic ulcer or a bowel obstruction called paralytic ileus
- if you are unable to urinate
- if you are pregnant; or
- if you are having an asthma attack
If you have certain conditions, you may need a dose adjustment or special tests to safely take dihydrocodeine and phenylephrine. Before taking this medication, tell your doctor if you have:
- heart disease or high blood pressure
- ischemic heart disease (reduced circulation of blood to the heart)
- asthma, COPD, or other breathing disorder
- diabetes
- glaucoma
- a thyroid disorder
- Addison’s disease or other adrenal gland disorders
- a history of head injury or brain tumor
- epilepsy or other seizure disorder
- kidney or liver disease
- gallbladder disease or pancreatitis
- enlarged prostate, urination problems
- mental illness; or
- a history of drug or alcohol addiction
FDA pregnancy category C. This medication may be harmful to an unborn baby. Dihydrocodeine can cause breathing problems or addiction/withdrawal symptoms in a newborn. Tell your doctor if you are pregnant or plan to become pregnant while you are taking this medication.
This medication can pass into breast milk and may harm a nursing baby. The use of dihydrocodeine by some nursing mothers may lead to life-threatening side effects in the baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
Older adults may be more sensitive to the side effects of this medication.
Dihydrocodeine may be habit-forming and should be used only by the person it was prescribed for. This medication should never be shared with another person, especially someone who has a history of drug abuse or addiction. Keep the medication in a secure place where others cannot get to it.
Alahist DHC Side Effects
What are the possible side effects of Alahist DHC?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using this medication and call your doctor at once if you have any of these serious side effects:
- feeling like you might pass out
- weak or shallow breathing
- confusion, hallucinations
- fast or pounding heartbeat
- seizure (convulsions)
- painful or difficult urination; or
- urinating less than usual or not at all
Less serious side effects may include:
- dizziness, drowsiness, headache, tired feeling
- feeling excited or restless
- increased dreaming
- nausea, vomiting, stomach pain, diarrhea, constipation
- increased sweating or urination
- warmth, redness, or tingly feeling under your skin
- dry mouth
- blurred vision
- mild skin rash or itching
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
Alahist DHC Interactions
What other drugs affect Alahist DHC?
Tell your doctor about all other medicines you use, especially:
- methyldopa (Aldomet)
- mecamylamine (Inversine)
- reserpine
- medicines to treat high blood pressure
- an antidepressant such as amitriptyline (Elavil), clomipramine (Anafranil), imipramine (Janimine, Tofranil), and others
- a beta-blocker such as atenolol (Tenormin), carteolol (Cartrol), metoprolol (Lopressor, Toprol), nadolol (Corgard), propranolol (Inderal), sotalol (Betapace), timolol (Blocadren), and others; or
- phenothiazines such as chlorpromazine (Thorazine), mesoridazine (Serentil), perphenazine (Trilafon), prochlorperazine (Compazine), promethazine (Phenergan, Adgan, Anergan 50, Pentazine), thioridazine (Mellaril), and others
This list is not complete and there may be other drugs that can interact with dihydrocodeine and phenylephrine. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.
What should I avoid while taking Alahist DHC?
This medication can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid drinking alcohol while you are taking this medication.
Tell your doctor if you regularly use other medicines that make you sleepy (such as pain medication, sleeping pills, muscle relaxers, and medicine for seizures, depression or anxiety). They can add to sleepiness caused by dihydrocodeine and phenylephrine.
Avoid taking diet pills, caffeine pills, or other stimulants (such as ADHD medications) without your doctor’s advice. Taking a stimulant together with phenylephrine can increase your risk of unpleasant side effects.
Do not use any other over-the-counter cold, allergy, or pain medication without first asking your doctor or pharmacist. Phenylephrine is contained in many medicines available over the counter. If you take certain products together you may accidentally take too much of this drug. Read the label of any other medicine you are using to see if it contains phenylephrine.
Alahist DHC Dosage
How should I take Alahist DHC?
Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label. Cold medicine is usually taken for only a short time until your symptoms clear up.
Always ask a doctor before giving cough or cold medicine to a child. Death can occur from the misuse of cough or cold medicine in very young children. Dihydrocodeine and phenylephrine should not be given to a child younger than 6 years old.
Measure liquid medicine with a special dose-measuring spoon or cup, not a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one.
Talk with your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache or skin rash.
Store dihydrocodeine and phenylephrine at room temperature away from moisture and heat.
Keep track of how much of this medicine has been used from the bottle. Dihydrocodeine is a drug of abuse and you should be aware if any person in the household is using this medicine improperly or without a prescription.
What happens if I overdose on Alahist DHC?
Seek emergency medical attention if you think you have used too much of this medicine. An overdose of dihydrocodeine can be fatal.
Overdose symptoms may include extreme drowsiness, pinpoint pupils, cold and clammy skin, limp muscles, fainting, seizure (convulsions), shallow breathing or breathing that stops.
What happens if I miss a dose of Alahist DHC?
Since cough and cold medicine is usually taken only as needed, you may not be on a dosing schedule. If you are taking the medication regularly, take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.
Edited from everydayhealth.com