Allfen

Name: Allfen

Proper Use of guaifenesin

This section provides information on the proper use of a number of products that contain guaifenesin. It may not be specific to Allfen. Please read with care.

Drinking plenty of water while taking guaifenesin may help loosen mucus or phlegm in the lungs.

For patients taking the extended-release capsule form of this medicine:

  • Swallow the capsule whole, or open the capsule and sprinkle the contents on soft food such as applesauce, jelly, or pudding and swallow without crushing or chewing.

For patients taking the extended-release tablet form of this medicine:

  • If the tablet has a groove in it, you may carefully break it into two pieces along the groove. Then swallow the pieces whole, without crushing or chewing them.
  • If the tablet does not have a groove, it must be swallowed whole. Do not break, crush, or chew it before swallowing.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For regular (short-acting) oral dosage forms (capsules, oral solution, syrup, or tablets):
    • For cough:
      • Adults—200 to 400 milligrams (mg) every four hours.
      • Children 6 to 12 years of age—100 to 200 mg every four hours.
      • Children 4 to 6 years of age—50 to 100 mg every four hours.
      • Children and infants up to 4 years of age—Use is not recommended .
  • For long-acting oral dosage forms (extended-release capsules or tablets):
    • For cough:
      • Adults—600 to 1200 mg every twelve hours.
      • Children 6 to 12 years of age—600 mg every twelve hours.
      • Children 4 to 6 years of age—300 mg every twelve hours.
      • Children and infants up to 4 years of age—Use is not recommended .

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

How should I take guaifenesin?

Use guaifenesin exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Do not give guaifenesin to a child younger than 4 years old. Always ask a doctor before giving a cough or cold medicine to a child. Death can occur from the misuse of cough and cold medicines in very young children. Drink extra fluids to help loosen the congestion and lubricate your throat while you are taking this medication. Take guaifenesin with food if it upsets your stomach.

Measure the liquid form of guaifenesin 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.

Do not crush, chew, break, or open a controlled-release, delayed-release, or extended-release tablet or capsule. Swallow it whole. Breaking or opening the pill may cause too much of the drug to be released at one time.

Store guaifenesin at room temperature away from moisture, heat, and direct sunlight.

For Healthcare Professionals

Applies to guaifenesin: compounding powder, oral capsule, oral capsule extended release, oral granule, oral liquid, oral solution, oral tablet, oral tablet extended release

General

Guaifenesin has been generally well tolerated.[Ref]

Gastrointestinal

Gastrointestinal side effects have included stomach upset and vomiting with higher than recommended doses. Doses recommended for expectoration have rarely been associated with gastrointestinal upset.[Ref]

Nervous system

Nervous system side effects have occasionally included dizziness and headache.[Ref]

Dermatologic

Dermatologic side effects have included rare reports of rash.[Ref]

Hypersensitivity

Hypersensitivity side effects have included a report of an anaphylactic reaction.[Ref]

Some side effects of guaifenesin may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

How it works

Guaifenesin increases the volume and reduces the viscosity (stickiness) of respiratory tract secretions. This makes coughing out these secretions easier.

Response and Effectiveness

Some effects of guaifenesin should be noticed within 30 minutes of taking it orally; however, up to two days of regular dosing may be needed before the full effects are seen. Liquid guaifenesin lasts for approximately four to six hours. Delayed-release capsules or tablets last for up to 12 hours.

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