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Brand & Generic Names

Asbron G Q-B
Asbron G Inlay Tablets Quiagen
Bronchial Quibron
Elixophyllin-GG Slo-Phyllin GG
Glyceryl T Syncophylate-GG
Lanophyllin-GG Theocolate
Mudrane GG2 Theolate

Basic Information

  • Habit forming? No
  • Prescription needed? Yes
  • Available as generic? Yes
  • Drug class: Bronchodilator, expectorant


  • Treatment for bronchial asthma symptoms.
  • Loosens mucus in respiratory passages.
  • Relieves coughing, wheezing, shortness of breath.

Dosage & Usage Information

How to take:
Tablet, capsule, elixir or syrup--Swallow with liquid.

When to take:
Most effective taken on empty stomach 1 hour before or 2 hours after eating. However, may take with food to lessen stomach upset.

If you forget a dose:
Take as soon as you remember up to 2 hours late. If more than 2 hours, wait for next scheduled dose (don't double this dose).

What drug does:
Relaxes and expands bronchial tubes.
Increases production of watery fluids to thin mucus so it can be coughed out or absorbed.

Time lapse before drug works:
15 to 30 minutes.

Don't take with:
Any other medicine without consulting your doctor or pharmacist.


Restlessness, irritability, confusion, hallucinations, drowsiness, mild weakness, nausea, vomiting blood, delirium, convulsions, rapid pulse, coma.


  • Dial 911 (emergency) or O (operator) for an ambulance or medical help. Then give first aid immediately.
  • See EMERGENCY Information.

Possible Adverse Reactions or Side Effects


    Difficult breathing, Discontinue. Seek uncontrollable heart emergency treatment. rate, loss of consciousness.


  • Headache, irritability, nervousness, restlessness, insomnia, drowsiness, nausea, vomiting.
  • Dizziness, lightheadedness, diarrhea, abdominal pain, heartburn.


    Skin rash or hives, red or flushed face, appetite loss, diarrhea.


    None expected.

Warnings & Precautions

Don't take if:

  • You are allergic to any bronchodilator or cough or cold preparation containing guaifenesin.
  • You have an active peptic ulcer.

Before you start, consult your doctor:

  • If you have had impaired kidney or liver function.
  • If you have gastritis, peptic ulcer, high blood pressure or heart disease.
  • If you take medication for gout.

Over age 60:
Adverse reactions and side effects may be more frequent and severe than in younger persons. For drug to work, you must drink 8 to 10 glasses of fluid per day.

Risk to unborn child outweighs drug benefits. Don't use.

Drug passes into milk. Avoid drug or discontinue nursing until you finish medicine. Consult doctor for advice on maintaining milk supply.

Infants & children:
Use only under medical supervision.

Prolonged use:
Stomach irritation.

Skin & sunlight:
No problems expected.

Driving, piloting or hazardous work:
Avoid if lightheaded, drowsy or dizzy. Otherwise, no problems expected.

May be unnecessary to finish medicine. Follow doctor's instructions.

No problems expected.

Possible Interaction with Other Drugs

------------------------ -----------------------
Allopurinol Decreased allopurinol effect.
Anticoagulants* Possible risk of bleeding.
Ciprofloxacin Increased possibility of central
nervous system poisoning, such as
nausea, vomiting, restlessness,
Clarithromycin Increased concentration of
Ephedrine Increased effect of both drugs.
Epinephrine Increased effect of both drugs.
Erythromycins* Increased bronchodilator effect.
Finasteride Decreased theophylline effect.
Furosemide Increased furosemide effect.
Lincomycins* Increased bronchodilator effect.
Lithium Decreased lithium effect.
Moricizine Decreased bronchodilator effect.
Nicotine Increased bronchodilator effect.
Probenecid Decreased effect of both drugs.
Propranolol Decreased bronchodilator effect.
Rauwolfia alkaloids* Rapid heartbeat.
Sulfinpyrazone Decreased sulfinpyrazone effect.
Ticlopidine Increased theophylline effect.
Troleandomycin Increased bronchodilator effect.

Possible Interaction with Other Substances

--------------- ---------------
Alcohol: No proven problems.
Beverages: You must drink 8 to 10 glasses of
fluid per day for drug to work.
Caffeine drinks. Nervousness and insomnia.
Cocaine: Excess stimulation. Avoid.
Foods: None expected.
Marijuana: Slightly increased antiasthmatic
effect of bronchodilator.
Tobacco: Decreased bronchodilator effect.
Cigarette smoking makes worse all
problems that this medicine treats.

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