Alahist LQ

Name: Alahist LQ

Uses of Alahist LQ

  • It is used to treat nose stuffiness.
  • It is used to ease allergy signs.

How is this medicine (Alahist LQ) best taken?

Use Alahist LQ as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • Take with or without food. Take with food if it causes an upset stomach.
  • Measure liquid doses carefully. Use the measuring device that comes with this medicine. If there is none, ask the pharmacist for a device to measure Alahist LQ (diphenhydramine and phenylephrine liquid, solution, and syrup).

What do I do if I miss a dose?

  • If you take this medicine on a regular basis, take a missed dose as soon as you think about it.
  • If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
  • Do not take 2 doses at the same time or extra doses.
  • Many times Alahist LQ is taken on an as needed basis. Do not take more often than told by the doctor.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.

What are some other side effects of this drug?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

  • Dizziness.
  • Feeling nervous and excitable.
  • Not able to sleep.
  • Feeling sleepy.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.

Usual Pediatric Dose for Allergic Rhinitis

diphenhydrAMINE-phenylephrine 25 mg-10 mg oral tablet:
diphenhydrAMINE-phenylephrine 12.5 mg-5 mg oral tablet, chewable, extended release:
13 yrs or older: 1 to 2 tablets orally every 12 hours
6 to 12 yrs: 1/2 to 1 tablet orally every 12 hours

diphenhydrAMINE-phenylephrine 25 mg-7.5 mg/5 mL oral suspension:
13 yrs or older: 5 to 10 mL orally every 12 hours
6 to 12 yrs: 2.5 to 5 mL orally every 12 hours
2 to less than 6 yrs: 1.25 to 2.5 mL orally every 12 hours

diphenhydrAMINE-phenylephrine 6.25 mg-6.25 mg/5 mL oral suspension, extended release:
6 to 11 yrs: 10 mL orally every 4 hours, not to exceed 6 doses in 24 hours.

diphenhydrAMINE-phenylephrine 25 mg-7.5 mg/5 mL oral liquid:
12 yrs or older: 5 mL orally every 4 to 6 hours, not to exceed 30 mL in 24 hours
6 to 11 yrs: 2.5 mL orally every 4 to 6 hours, not to exceed 15 mL in 24 hours

diphenhydrAMINE-phenylephrine 6.25 mg-2.5 mg/5 mL oral liquid:
12 yrs or older: 20 mL orally every 4 hours, not to exceed 120 mL in 24 hours
6 to 11 yrs: 10 mL orally every 4 hours, not to exceed 60 mL in 24 hours

diphenhydrAMINE-phenylephrine 12.5 mg-5 mg/5 mL oral liquid:
6 to 11 yrs: 5 mL orally every 4 hours, not to exceed 30 mL in 24 hours

diphenhydrAMINE-phenylephrine 12.5 mg-5 mg oral disintegrating strip:
6 to 11 yrs: dissolve 1 strip on tongue

Usual Pediatric Dose for Cold Symptoms

diphenhydrAMINE-phenylephrine 25 mg-10 mg oral tablet:
diphenhydrAMINE-phenylephrine 12.5 mg-5 mg oral tablet, chewable, extended release:
13 yrs or older: 1 to 2 tablets orally every 12 hours
6 to 12 yrs: 1/2 to 1 tablet orally every 12 hours

diphenhydrAMINE-phenylephrine 25 mg-7.5 mg/5 mL oral suspension:
13 yrs or older: 5 to 10 mL orally every 12 hours
6 to 12 yrs: 2.5 to 5 mL orally every 12 hours
2 to less than 6 yrs: 1.25 to 2.5 mL orally every 12 hours

diphenhydrAMINE-phenylephrine 6.25 mg-6.25 mg/5 mL oral suspension, extended release:
6 to 11 yrs: 10 mL orally every 4 hours, not to exceed 6 doses in 24 hours.

diphenhydrAMINE-phenylephrine 25 mg-7.5 mg/5 mL oral liquid:
12 yrs or older: 5 mL orally every 4 to 6 hours, not to exceed 30 mL in 24 hours
6 to 11 yrs: 2.5 mL orally every 4 to 6 hours, not to exceed 15 mL in 24 hours

diphenhydrAMINE-phenylephrine 6.25 mg-2.5 mg/5 mL oral liquid:
12 yrs or older: 20 mL orally every 4 hours, not to exceed 120 mL in 24 hours
6 to 11 yrs: 10 mL orally every 4 hours, not to exceed 60 mL in 24 hours

diphenhydrAMINE-phenylephrine 12.5 mg-5 mg/5 mL oral liquid:
6 to 11 yrs: 5 mL orally every 4 hours, not to exceed 30 mL in 24 hours

diphenhydrAMINE-phenylephrine 12.5 mg-5 mg oral disintegrating strip:
6 to 11 yrs: dissolve 1 strip on tongue

Renal Dose Adjustments

Data not available

Diphenhydramine / phenylephrine Breastfeeding Warnings

Diphenhydramine-phenylephrine is excreted into human milk. The manufacturer recommends that due to the potential for serious adverse reactions in nursing infants, a decision should be made to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother.

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