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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Childrens Pediaclear 8
Generic Name
Pyrilamine Maleate
Active Ingredient
PyrilamineCategory
Central Nervous System Stimulant [EPC]
Salt Form
Maleate
Variants
1
Different strengths and dosage forms
| Strength | Form | Route | NDC |
|---|---|---|---|
| 12.5 mg/15mL | LIQUID | ORAL | 58809-770 |
Detailed information about Childrens Pediaclear 8
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Childrens Pediaclear 8, you must consult a qualified healthcare professional.
Pyrilamine is a first-generation ethylenediamine antihistamine used to relieve symptoms of allergic rhinitis, the common cold, and menstrual discomfort. It works by antagonizing H1 receptors to reduce the effects of histamine in the body.
For the treatment of allergic rhinitis or symptoms of the common cold, the standard adult dosage of Pyrilamine maleate is typically 25 mg to 50 mg taken orally every 6 to 8 hours. Healthcare providers generally advise not to exceed a total daily dose of 200 mg unless specifically directed under medical supervision.
When used for the management of premenstrual syndrome (PMS) symptoms, Pyrilamine is often dosed at 15 mg to 25 mg every 4 to 6 hours. In these cases, it is frequently combined with 500 mg of acetaminophen and 60 mg of caffeine. Patients should be careful to track the total amount of each ingredient consumed to stay within safe daily limits.
The use of Pyrilamine in children requires extreme caution due to the risk of paradoxical excitation and the general sensitivity of the pediatric nervous system to first-generation antihistamines.
Specific dosing adjustments for renal impairment have not been formally established by the FDA for Pyrilamine. However, because the metabolites are excreted renally, patients with significantly decreased kidney function (GFR < 30 mL/min) should use lower starting doses and monitor for signs of increased sedation or anticholinergic toxicity.
Since Pyrilamine is extensively metabolized by the liver, patients with hepatic cirrhosis or significant liver dysfunction may experience prolonged half-life and increased plasma concentrations. A reduction in frequency (e.g., dosing every 12 hours instead of every 6) may be necessary.
According to the American Geriatrics Society (AGS) Beers Criteria, first-generation antihistamines like Pyrilamine should generally be avoided in the elderly. If use is deemed necessary, the lowest effective dose should be used, as older adults are at a much higher risk for confusion, dizziness, and falls.
If you miss a dose of Pyrilamine, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and return to your regular dosing schedule. Do not take two doses at once to make up for a missed one, as this significantly increases the risk of sedation and respiratory depression.
Signs of a Pyrilamine overdose may include extreme drowsiness, dilated pupils, flushed skin, fever, hallucinations, tremors, or seizures. In severe cases, cardiovascular collapse or respiratory failure can occur.
Emergency Measures: In the event of a suspected overdose, contact your local poison control center or seek emergency medical attention immediately. Treatment is primarily supportive, focusing on airway maintenance and managing neurological symptoms.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose without medical guidance, especially when using multi-ingredient products.
The most frequently reported side effect of Pyrilamine is somnolence (drowsiness). Because it crosses the blood-brain barrier easily, it affects the central nervous system more significantly than newer antihistamines. Patients often describe this as a 'foggy' feeling or a lack of mental clarity. This effect usually begins within 30 to 60 minutes of ingestion and can last for several hours.
Other common effects include:
Some patients may experience gastrointestinal or neurological variations, including:
Rare but documented reactions include:
> Warning: Stop taking Pyrilamine and call your doctor immediately if you experience any of these symptoms. These may indicate a severe allergic reaction or toxicity.
Pyrilamine is generally intended for short-term use. Prolonged use (weeks to months) can lead to:
As of 2024, there are no FDA black box warnings specifically for Pyrilamine maleate. However, it carries significant class-wide warnings regarding its use in children and the elderly, as well as its potential to cause severe CNS depression when combined with other substances.
Report any unusual symptoms to your healthcare provider. Monitoring for changes in mood, vision, or urinary habits is recommended during the course of treatment.
Pyrilamine is a potent medication that requires careful handling. The most critical safety point is the risk of Central Nervous System (CNS) depression. Patients must be aware that their coordination, reaction time, and judgment may be significantly impaired while taking this drug. This impairment can occur even if the patient does not feel overtly 'sleepy.'
No FDA black box warnings for Pyrilamine. However, the FDA has issued general public health advisories regarding the use of OTC cough and cold medicines in children under the age of 4, as serious and potentially life-threatening side effects can occur.
For short-term OTC use, routine lab monitoring is generally not required. However, for patients using Pyrilamine-containing products frequently, healthcare providers may monitor:
Do not drive, operate heavy machinery, or engage in hazardous activities until you know how Pyrilamine affects you. The sedative effects are unpredictable and can be significantly worsened by lack of sleep or concurrent medication use. In many jurisdictions, driving while impaired by an antihistamine can lead to legal penalties similar to alcohol impairment.
Avoid alcohol while taking Pyrilamine. Alcohol has a synergistic effect with first-generation antihistamines, meaning the combination produces much deeper CNS depression than either substance alone. This can lead to profound lethargy, respiratory depression, and increased risk of accidents.
While Pyrilamine does not typically require a tapering schedule after short-term use, stopping it abruptly after long-term use may result in 'rebound' symptoms, such as insomnia or increased nasal congestion. If you have been taking it daily for more than two weeks, consult your doctor about the best way to stop.
> Important: Discuss all your medical conditions, especially any history of breathing problems or eye disease, with your healthcare provider before starting Pyrilamine.
For each major interaction, the primary management strategy is either avoidance or a significant reduction in dosage of one or both agents. Always inform your pharmacist of all substances you are taking, including 'natural' supplements.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, as the risk of polypharmacy is high with OTC antihistamines.
Pyrilamine should NEVER be used in the following circumstances:
Conditions requiring a careful risk-benefit analysis by a physician include:
There is a documented risk of cross-sensitivity between Pyrilamine and other members of the ethylenediamine class. If you have reacted poorly to tripelennamine or antazoline, you are highly likely to react to Pyrilamine. Additionally, some patients sensitive to certain dyes or preservatives in liquid formulations may experience reactions.
> Important: Your healthcare provider will evaluate your complete medical history before prescribing or recommending Pyrilamine to ensure it does not conflict with existing conditions.
Pyrilamine is generally classified as FDA Pregnancy Category B or C (depending on the specific manufacturer and formulation). Animal studies have not always shown a risk to the fetus, but there are no adequate, well-controlled studies in pregnant women.
Always consult an obstetrician before using Pyrilamine during pregnancy.
Pyrilamine is not recommended for use while breastfeeding. Small amounts of the drug are excreted in breast milk. Because infants have immature metabolic pathways, they are more susceptible to the sedative effects of the drug, which can lead to poor feeding or respiratory issues. Furthermore, antihistamines can lower serum prolactin levels, potentially decreasing the mother's milk supply.
Pyrilamine is approved for use in children over the age of 6 in specific dosages. However, children are uniquely susceptible to paradoxical excitation, where the drug causes them to become hyperactive, restless, and unable to sleep instead of sedated. Overdose in children is a medical emergency and can lead to hallucinations and seizures. Never use Pyrilamine to make a child sleepy for travel or behavioral management.
Patients over the age of 65 are at the highest risk for adverse effects. The 'Beers Criteria' lists first-generation antihistamines as high-risk medications for the elderly.
In patients with a GFR below 50 mL/min, the interval between doses should be extended. For those on dialysis, Pyrilamine is not effectively removed by the procedure, so extra 'booster' doses are not necessary, and toxicity must be closely monitored.
In patients with Child-Pugh Class B or C hepatic impairment, the initial dose should be reduced by 50%. Accumulation of the parent drug can lead to prolonged CNS depression and increased anticholinergic side effects.
> Important: Special populations require individualized medical assessment. Never share your medication with others, especially those in these high-risk groups.
Pyrilamine is a highly selective H1-receptor antagonist. It competes with free histamine for binding at H1-receptor sites on the effector cells in the GI tract, blood vessels, and respiratory tract. By binding to these receptors, it prevents the activation of the phospholipase C pathway, thereby inhibiting the release of intracellular calcium and preventing the contraction of smooth muscle and the increase in capillary permeability.
Unlike newer 'non-sedating' antihistamines, Pyrilamine has a high affinity for H1 receptors in the brain. It also exhibits significant antimuscarinic activity, binding to M1, M2, and M3 acetylcholine receptors, which explains its drying effects and potential for causing confusion and tachycardia.
| Parameter | Value |
|---|---|
| Bioavailability | ~70% (subject to first-pass metabolism) |
| Protein Binding | 60% - 70% |
| Half-life | 2 - 5 hours |
| Tmax | 1 - 3 hours |
| Metabolism | Hepatic (N-demethylation) |
| Excretion | Renal (>90% as metabolites) |
Pyrilamine belongs to the First-Generation Antihistamine class, specifically the ethylenediamine sub-group. Related medications include tripelennamine and antazoline. It is distinct from the ethanolamine class (e.g., diphenhydramine) and the alkylamine class (e.g., chlorpheniramine).
Common questions about Childrens Pediaclear 8
Pyrilamine is primarily used as an antihistamine to relieve symptoms of allergies, such as sneezing, runny nose, and itchy eyes. It is also a very common ingredient in over-the-counter medications designed to treat the symptoms of premenstrual syndrome (PMS), including irritability and water retention. Because it has sedative properties, it helps reduce the tension often associated with hormonal shifts. Additionally, it may be found in multi-symptom cold and flu medicines to help dry up nasal secretions. You should always check with a doctor to ensure it is the right choice for your specific symptoms.
The most frequent side effect experienced by users is significant drowsiness or sleepiness, which is why it is often included in 'nighttime' formulas. Many people also report experiencing a dry mouth, dry nose, or dry throat due to the drug's anticholinergic effects. Dizziness and a feeling of mental 'fogginess' are also quite common, particularly in the first few hours after taking a dose. Some individuals may experience stomach upset or nausea, which can often be mitigated by taking the medication with food. If these effects persist or become bothersome, it is important to consult a healthcare professional.
No, you should strictly avoid consuming alcohol while taking Pyrilamine. Both alcohol and Pyrilamine are central nervous system depressants, and when taken together, they significantly enhance each other's effects. This combination can lead to extreme sedation, dangerous levels of respiratory depression, and a total loss of coordination. The risk of accidents, falls, and severe injury is greatly increased when these two substances are mixed. Even small amounts of alcohol can trigger these dangerous interactions, so it is safest to wait until the drug is completely out of your system before drinking.
Pyrilamine's safety during pregnancy has not been definitively established through large-scale clinical trials, placing it in a category where it should only be used if clearly needed. While some healthcare providers may suggest it for severe allergy symptoms when other options have failed, it is generally avoided, especially in the first and third trimesters. In the third trimester, there is a theoretical risk that the drug could affect the newborn's breathing or cause irritability after birth. Always discuss the risks and benefits with your obstetrician before taking any medication containing Pyrilamine while pregnant. They may recommend safer, second-generation antihistamines as an alternative.
Pyrilamine is known for its relatively rapid onset of action, with most patients beginning to feel relief from allergy symptoms within 15 to 30 minutes of oral ingestion. The peak effect, where the drug reaches its maximum concentration in the bloodstream, typically occurs between 1 and 2 hours after the dose is taken. Because its half-life is fairly short, the effects generally last for about 4 to 6 hours. This necessitates multiple doses throughout the day if continuous symptom control is required. For the best results in managing PMS or allergies, it is often recommended to take the medication as soon as symptoms are noticed.
For the vast majority of people using Pyrilamine for short-term allergy or PMS relief, it is perfectly safe to stop taking the medication suddenly. It does not typically cause a physical dependence that requires a tapering process. However, if you have been using it daily for a prolonged period, you might experience a temporary 'rebound' effect where your allergy symptoms seem slightly worse for a day or two. If you find that you cannot manage your symptoms without daily use of Pyrilamine, you should talk to your doctor about long-term allergy management strategies. They can help you transition to a non-sedating antihistamine if necessary.
If you miss a dose, you should take it as soon as you realize it, provided it isn't almost time for your next scheduled dose. If you are within a couple of hours of your next dose, it is better to skip the missed one entirely and stay on your regular schedule. You must never take a double dose to 'catch up,' as this significantly increases the risk of toxic side effects like extreme lethargy or heart palpitations. Since Pyrilamine is often taken on an as-needed basis for symptoms, skipping a dose usually just means a temporary return of your allergy or PMS symptoms. Consistency is less critical than with medications like antibiotics.
Weight gain is not a commonly reported side effect of Pyrilamine, especially when used for short-term symptom relief. Unlike some other classes of medications, such as certain antidepressants or steroids, first-generation antihistamines do not typically alter metabolism or significantly increase appetite in most users. However, because the drug causes sedation, some people might become less active while taking it, which could theoretically lead to minor weight changes over time if used chronically. If you notice significant or rapid weight gain while taking this medication, it is likely due to another factor or a combination product ingredient, and you should consult your doctor. Most users find that their weight remains stable during treatment.
Pyrilamine has several significant drug interactions that must be carefully managed by a healthcare provider. It should never be taken with MAO inhibitors, and it must be used with extreme caution alongside other sedatives, such as opioid pain relievers, sleeping pills, or anti-anxiety medications. Because it has anticholinergic properties, taking it with other drugs that dry out the body (like certain bladder medications) can lead to severe side effects like urinary retention. It is also frequently found in combination products containing acetaminophen or caffeine, so you must ensure you aren't 'doubling up' on those ingredients by taking other OTC meds. Always provide your doctor or pharmacist with a full list of your current medications.
Yes, Pyrilamine maleate is widely available as a generic medication and is a common component in many store-brand 'Menstrual Relief' or 'Nighttime Allergy' products. Because it is an older drug, the patent has long since expired, making it an affordable option for most patients. You can find it as a single ingredient in some formulations, but it is much more commonly found as part of a multi-ingredient stack. Generic versions are required by the FDA to have the same active ingredient and strength as the brand-name equivalents. When buying generic, always check the 'Drug Facts' label to ensure Pyrilamine maleate is listed as the active antihistamine.