Cyproheptadine: Uses, Side Effects & Dosage Info
Table of Contents
Introduction to Cyproheptadine
Cyproheptadine is a first-generation antihistamine medication used to relieve symptoms of allergic reactions such as red, irritated, itchy, and watery eyes, sneezing, runny nose, hives, and itching. It works by blocking the effects of histamine, a substance in the body that causes allergic symptoms. Cyproheptadine is available as an oral tablet, syrup, or liquid.
Medical Uses
Cyproheptadine is primarily used to treat allergic symptoms, including:
In addition to its antihistamine properties, cyproheptadine also has anticholinergic and antiserotonergic effects. It is sometimes prescribed off-label as an appetite stimulant in children and adolescents.
Dosage and Administration
The recommended dosage of cyproheptadine varies depending on the condition being treated and the patient’s age. Always follow the dosing instructions provided by your doctor or ph armacist. Typical dosages are:
- Adults and children over 12 years: 4 mg orally 3 times daily
- Children 7-12 years: 2 mg orally 2-3 times daily
- Children 2-6 years: 2 mg orally 2 times daily
Cyproheptadine can be taken with or without food. Tablets should be swallowed whole with a glass of water. Liquid forms should be measured carefully using the provided dosing syringe or cup.
Side Effects and Warnings
Common side effects of cyproheptadine include:
- Drowsiness
- Dry mouth, nose, and throat
- Dizziness
- Nausea
- Blurred vision
Rare but serious side effects may include confusion, hallucinations, seizures, and difficulty urinating. Seek immediate medical attention if you experience these symptoms.
Cyproheptadine may cause drowsiness and impair your ability to drive or operate machinery. Avoid alcohol and use caution when engaging in activities that require alertness.
Interactions
Cyproheptadine can interact with several medications, including:
- Other antihistamines or allergy medications
- Antidepressants, such as MAOIs and SSRIs
- Seizure medications
- Sedatives, tranquilizers, and sleeping pills
Inform your doctor of all medications you are taking before starting cyproheptadine to avoid potentially h armful interactions.
Special Populations
Pediatric Use
Cyproheptadine is sometimes prescribed off-label to stimulate appetite in children, but its safety and efficacy for this use have not been well-established. Discuss the risks and benefits with your child’s pediatrician.
Pregnancy and Breastfeeding
The safety of cyproheptadine during pregnancy has not been conclusively established. It is classified as Pregnancy Category B, meaning animal studies have not shown a risk to the fetus, but there are no adequate studies in pregnant women. Cyproheptadine passes into breast milk and may cause side effects in nursing infants. Consult your doctor before taking cyproheptadine if you are pregnant, planning to become pregnant, or breastfeeding.
Elderly Patients
Older adults may be more sensitive to the side effects of cyproheptadine, particularly drowsiness, confusion, and anticholinergic effects. Lower doses may be necessary, and close monitoring is advised.
armacology”> armacology/”>Ph armacology
Mechanism of Action
Cyproheptadine is a potent antagonist of histamine and serotonin receptors. By blocking the effects of histamine, it reduces the symptoms of allergic reactions. Its antiserotonergic properties may contribute to its appetite-stimulating effects.
armacokinetics/”>Ph armacokinetics
Cyproheptadine is rapidly absorbed from the gastrointestinal tract, with peak plasma concentrations occurring within 1-3 hours after oral administration. It is extensively metabolized in the liver and excreted primarily in the urine. The elimination half-life is approximately 16 hours.
Brand Names and Availability
Cyproheptadine is available under the brand name Periactin, as well as in generic forms. It is a prescription medication in the United States and many other countries.
