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Semprex D

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The 16-year-old had his first reaction to peanut butter at 9 months of age when he broke out in hiv"...

Semprex D

SEMPREX-D
(acrivastine and pseudoephedrine hydrochloride) Capsule

DRUG DESCRIPTION

SEMPREX-D Capsules (acrivastine and pseudoephedrine hydrochloride) are a fixed combination product formulated for oral administration. Acrivastine is an antihistamine and pseudoephedrine is a decongestant. Each capsule contains 8 mg acrivastine and 60 mg pseudoephedrine hydrochloride and the inactive ingredients: lactose, magnesium stearate and sodium starch glycolate. The green and white capsule shell consists of gelatin, D&C Yellow No. 10, FD&C Green No. 3, and titanium dioxide. The yellow band around the capsule consists of gelatin and D&C Yellow No. 10. The capsules may contain one or more parabens and are printed with edible black and white inks.

The chemical name of acrivastine is (E,E)-3-[6-[1-(4-methylphenyl)-3-(1-pyrrolidinyl)-1-propenyl]-2-pyridinyl]-2-propenoic acid; the molecular formula is C22H24N2O2. As an analog of triprolidine hydrochloride, acrivastine is classified as an alkylamine antihistamine. Acrivastine is an odorless, white to pale cream crystalline powder that is soluble in chloroform and alcohol and slightly soluble in water.

The chemical name of pseudoephedrine hydrochloride is [S-(R*,R*)]-α-[1-(methylamino)ethyl]benzenemethanol hydrochloride; the molecular formula is C10H15NO•HCl. Pseudoephedrine is one of the naturally occurring dextrorotatory diastereoisomers of ephedrine and is classified as an indirect sympathomimetic amine. Pseudoephedrine hydrochloride occurs as odorless, fine white to off-white crystals or powder; the drug is soluble in water, alcohol and chloroform.

Structural formulae for the active ingredients of SEMPREX-D (acrivastine and pseudoephedrine) Capsules are as follows:

Acrivastine Structural Formula Illustration

(a) Acrivastine (Molecular Weight = 348.44)

Pseudo ephedrine hydrochloride Structural Formula Illustration

(b) Pseudo ephedrine hydrochloride (Molecular Weight = 201.70)

What are the possible side effects of acrivastine and pseudoephedrine (Semprex-D)?

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 medicine and call your doctor at once if you have a serious side effect such as:

  • fast, pounding, or uneven heartbeat;
  • severe dizziness or anxiety;
  • confusion, hallucinations, unusual thoughts or behavior;
  • urinating less than usual or not at all;
  • easy bruising or bleeding, unusual weakness, fever, chills, body aches, flu symptoms;...

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What are the precautions when taking acrivastine and pseudoephedrine (Semprex D)?

Before taking this product, tell your doctor or pharmacist if you are allergic to any of its ingredients; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: breathing problems (such as asthma, emphysema), diabetes, glaucoma, heart problems, high blood pressure, kidney problems, liver disease, seizures, stomach/intestinal problems (such as ulcers, blockage), overactive thyroid (hyperthyroidism), difficulty urinating (such as due to enlarged prostate).

This drug may make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires...

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Last reviewed on RxList: 5/20/2009
This monograph has been modified to include the generic and brand name in many instances.

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