Brand Name
Aller-chlor®
Pronunciation
AL-er-CLOR
Common Drug Name
Chlorpheniramine
What should I discuss with my veterinarian while considering Chlorpheniramine?
Talk to your veterinarian about what tests and exams may be necessary while your pet is taking chlorpheniramine. Also discuss how long the treatment period will be, what the correct dosage should be, and what type of outcome is expected. You and your veterinarian should talk about any other treatment options that are recommended for your pet.
Tell your veterinarian if your pet has glaucoma, high blood pressure, heart disease, hyperthyroidism, or has any obstruction of the digestive tract or urinary tract.
Notify your veterinarian of any other medications or supplements your pet is taking.
What should I do if I miss a dose?
If you miss a dose, give it as soon as you remember. If it is almost time for the next dose, skip the one you missed and go back to the regular schedule. Do not give two doses at once.
What is the most important information I should know?
Chlorpheniramine is not a cure, and symptoms will return if the medication is discontinued. This medication may cause sedation.
Who should not take it?
Not for use in animals hypersensitive (allergic) to Chlorpheniramine or similar medications. Use with caution in animals with high blood pressure, hyperthyroidism, glaucoma, enlarged prostate, severe cardiac disease, obstruction of the urinary bladder, or obstruction of the pylorus (junction between the stomach and intestine).
Use in pregnant and lactating animals (female animals nursing their young) only if benefits outweigh the risks. Because this medication may cause sedation, its use should be avoided in working animals (military dogs, police dogs, seeing-eye dogs, hearing dogs, etc.) Discontinue use at least 7 days prior to skin allergy testing.
What side effects may be seen when taking Chlorpheniramine?
In dogs the following side effects have been observed: sleepiness, sedation, dry mouth, vomiting, diarrhea, loss of appetite, and/or inability to urinate.
In cats the following side effects have been observed: sleepiness, sedation, or hyperexcitability (agitation).You may also see dry mouth, vomiting, diarrhea, loss of appetite, or inability to urinate.
Consult your veterinarian if you notice any of the above side effects. If your pet experiences an allergic reaction to the medication, signs may include facial swelling, hives, scratching, sudden onset of diarrhea, vomiting, shock, seizures, pale gums, cold limbs, or coma. If you observe any of the above signs, contact your veterinarian immediately.
How is it stored?
Store at room temperature in a tight, light-resistant, childproof container. Do not freeze. Keep out of reach of children and pets.
What should I do if I know of or suspect there has been an overdose?
An overdose may cause increased sedation, coma, hyperexcitability, or seizures; you could also see severe drying of the mouth and eyes, rapid heartbeat, depressed respiration, fever, inability to urinate, and low blood pressure.
If you know or suspect your pet has had an overdose, or if you observe any of these signs in your pet, contact your veterinarian immediately.
What should I avoid when giving my pet Chlorpheniramine?
Consult your veterinarian before using chlorpheniramine with vitamins and supplements, other central nervous system (CNS) depressant drugs such as barbiturates or antidepressants, oral anticoagulants (heparin, warfarin), amitraz (Mitaban) or selegiline (Anipryl) since interactions may occur.
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