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Codeine Phosphate

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Codeine Phosphate

Codeine Phosphate

DRUG DESCRIPTION

WARNING - MAY BE HABIT FORMING

Codeine is an alkaloid obtained from opium or prepared from morphine by methylation and occurs as white crystals. Codeine effloresces slowly in dry air and is effected by light. The chemical name of codeine phosphate is 7,8-Didehydro-4,5alpha-epoxy-3-methoxy-17-methylmorphinan-6alpha-ol phosphate (1:1)(salt) hemihydrate and has the empirical formula of C18H21NO3·H3PO4·1/2H20. Its molecular weight is 406.4.

Each soluble tablet contains 30 mg (0.074 mmol) or 60 mg (0.15 mmol) of codeine phosphate. These tablets also contain lactose and sucrose.

Soluble tablets of codeine phosphate are freely soluble in water. They are intended for the preparation of solutions for parenteral administration. These tablets are not sterile. Codeine phosphate is an analgesic.

What are the possible side effects of codeine ()?

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.

Call your doctor at once if you have a serious side effect such as:

  • slow heart rate, weak pulse, fainting, shallow breathing;
  • feeling like you might pass out;
  • confusion, agitation, hallucinations, unusual thoughts or behavior;
  • feelings of extreme happiness or sadness;
  • seizure (convulsions); or
  • problems with urination.

Less serious side effects include:

  • feeling...

Read All Potential Side Effects and See Pictures of Codeine Phosphate »

Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.

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Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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