Buy Phenergan
phenergan
$24.30
- Active ingredient: Promethazine
- Category: Allergy & Asthma
- Delivery time: Airmail (14-21 days) | EMS trackable (5-9 days)
- Prescription: Included
- Availability: In Stock
Phenergan (Promethazine) 10mg and 25mg tablets are available to purchase from our Singapore pharmacy with dependable delivery. This antihistamine medication works by blocking histamine and other neurotransmitters to provide comprehensive relief from allergic reactions, motion sickness, and nausea. It offers an ideal solution for adults managing seasonal allergies, travel sickness, or occasional nausea who seek effective symptomatic relief.
Table of contents
- Phenergan (Promethazine) Buyer and Patient Handbook in Singapore
- What is Phenergan?
- Who Should Use Phenergan?
- How Does It Work?
- Why Choose Phenergan?
- Dosage, Administration, Lifestyle and Dietary Recommendations
- Recommended Dosage
- How to Take
- Missed Dose
- Overdose
- Special Populations
- Lifestyle & Diet
- Precautions and Warnings
- Drug Interactions
- Potential Side Effects
- Common Side Effects
- Less Common Side Effects
- Serious Side Effects
- Who Should Avoid This Medication?
- Storage Instructions
- Phenergan Alternatives
- Frequently Asked Questions
- How soon will I feel relief after taking Phenergan?
- Can I drink coffee while taking Phenergan?
- Will Phenergan make me drowsy the next day?
- Is it safe to use Phenergan with my asthma inhaler?
- Can I take Phenergan during pregnancy?
- What should I do if I miss a dose?
- Are there any foods I should avoid?
- How long can I stay on Phenergan?
- Glossary
- Disclaimer
- Phenergan Properties
- Phenergan Drug Class
- Phenergan Connected Conditions
- How to order Phenergan from our Online Pharmacy
- Reviews
- Write your review
Phenergan (Promethazine) Buyer and Patient Handbook in Singapore
What is Phenergan?
Phenergan is a prescription antihistamine of the phenothiazine class used to relieve allergy-related symptoms and control asthma-related airway reactivity. It works by blocking histamine H1 receptors and also has sedative and anti-emetic properties. In Singapore, Phenergan is approved by the Health Sciences Authority (HSA) and is available as oral tablets.
Who Should Use Phenergan?
- Adults and adolescents (≥12 years) with moderate-to-severe Allergic Rhinitis, Urticaria, or allergic Conjunctivitis.
- Patients requiring adjunct therapy for Asthma exacerbations when other inhaled treatments are insufficient.
- Individuals who experience Motion Sickness or need anti-emetic relief after surgery.
How Does It Work?
Phenergan blocks histamine-1 receptors, preventing histamine-mediated vessel dilation, itching, and mucus production. By also dampening the brain’s vestibular centers, it reduces Nausea and dizziness. Because it can cause Drowsiness, avoid operating heavy machinery or driving until you know how it affects you.
Why Choose Phenergan?
- Rapid symptom relief within 30 minutes of the first dose.
- Available in two convenient tablet strengths (10 mg and 25 mg).
- Well-studied safety profile with decades of clinical use.
- Generic-available alternatives offer cost savings, while the branded version ensures consistent quality.
Dosage, Administration, Lifestyle and Dietary Recommendations
Recommended Dosage
- 10 mg tablet: 1-2 tablets every 4-6 hours as needed (max 6 tablets/24 h).
- 25 mg tablet: 1 tablet every 6-8 hours as needed (max 3 tablets/24 h).
How to Take
- Swallow tablets whole with a full glass of water.
- Can be taken with or without food; taking with food may reduce mild stomach irritation.
Missed Dose
- If you remember the dose within 2 hours, take it.
- If more than 2 hours have passed, skip the missed tablet and resume the regular schedule. Do not double-dose.
Overdose
- Seek urgent medical help or contact the Singapore Poison Centre (180-222-5555).
- Symptoms may include extreme drowsiness, rapid heart rate, or Seizures.
Special Populations
- Elderly: Start with the lowest effective dose; monitor for increased Sedation.
- Children <12 years: Not recommended unless specifically prescribed by a specialist.
- Liver or kidney impairment: Dose reduction may be required; consult a healthcare professional.
Lifestyle & Diet
- Avoid alcohol and other central nervous system depressants as they amplify drowsiness.
- Grapefruit juice can increase blood levels of promethazine; limit intake.
- Stay hydrated; the medication may cause dry mouth.
Precautions and Warnings
- Use caution if you have a history of Glaucoma, enlarged prostate, or urinary retention.
- Do not combine with other antihistamines or sedating agents without professional advice.
- Pregnant or breastfeeding women should only use Phenergan if the benefits outweigh potential risks.
Drug Interactions
| Interacting Drug Class | Risk Level | Recommended Action |
|---|---|---|
| CNS depressants (e.g., benzodiazepines) | ↑ Sedation | Reduce dose or avoid |
| Monoamine oxidase inhibitors (MAOIs) | ↑ Hypertensive crisis | Discontinue MAOI ≥ 14 days prior |
| Anticholinergic agents (e.g., atropine) | ↑ Anticholinergic load | Monitor for dry mouth, constipation |
Potential Side Effects
Common Side Effects
- Drowsiness or Fatigue
- Dry mouth, throat, or nasal passages
- Dizziness or light-headedness
Less Common Side Effects
- Blurred vision
- Constipation or abdominal discomfort
- Low blood pressure when standing (orthostatic hypotension)
Serious Side Effects
- Severe allergic reaction: rash, swelling, difficulty breathing - call emergency services.
- Persistent rapid heart rate or irregular heartbeat.
- Hallucinations or severe confusion.
Who Should Avoid This Medication?
- Individuals with known hypersensitivity to promethazine or any phenothiazine.
- Patients with severe respiratory Depression or conditions requiring mechanical ventilation.
- Those who have had a recent severe cardiac Arrhythmia.
Storage Instructions
- Keep tablets in a tightly closed container at 20-25 °C (room temperature).
- Protect from excess moisture and direct sunlight.
- Keep out of reach of children and pets.
Phenergan Alternatives
| Name | Class | Key Difference |
|---|---|---|
| Diphenhydramine (Benadryl) | Antihistamine | Shorter half-life, more pronounced anticholinergic effects |
| Cetirizine (Zyrtec) | Second-generation antihistamine | Lower sedation risk, once-daily dosing |
| Levocetirizine (Xyzal) | Second-generation antihistamine | Higher potency, similar dosing schedule |
Frequently Asked Questions
How soon will I feel relief after taking Phenergan?
Most people notice reduced itching, sneezing, or nausea within 30 minutes of the first dose.
Can I drink coffee while taking Phenergan?
Yes, caffeine does not interfere with the drug’s antihistamine action, but avoid excessive amounts that may increase heart rate.
Will Phenergan make me drowsy the next day?
The sedative effect is dose-dependent; lower doses (10 mg) often wear off by morning, whereas 25 mg may cause lingering drowsiness in sensitive individuals.
Is it safe to use Phenergan with my asthma inhaler?
Phenergan can be used as an adjunct to inhaled bronchodilators, but do not replace your prescribed inhaler regimen.
Can I take Phenergan during pregnancy?
Only if a doctor has determined the benefit outweighs any potential risk to the fetus.
What should I do if I miss a dose?
Take it as soon as you remember if it is within 2 hours; otherwise skip and continue with your regular schedule.
Are there any foods I should avoid?
Minimize grapefruit juice and alcoholic beverages, as they can intensify drowsiness or increase drug levels.
How long can I stay on Phenergan?
Short-term use (a few days to two weeks) is typical for allergy or motion-sickness relief. Prolonged use should be reviewed by a healthcare professional.
Glossary
- Antihistamine: A medication that blocks the action of histamine, a chemical released during Allergic Reactions.
- Phenothiazine: A chemical class that includes drugs with antihistamine, sedative, and anti-emetic properties.
- Sedation: A state of calmness or drowsiness induced by a drug.
Disclaimer
The information provided here is for general educational purposes only and does not substitute professional medical advice. Off-label uses are not discussed; always consult a qualified healthcare provider before starting, stopping, or changing any medication. This handbook reflects the services offered by our online pharmacy platform in Singapore; users are responsible for ensuring they meet all local regulatory requirements.
Phenergan Properties
- Original Manufacturer: Various
- Clinical use: Treatment of nausea, vomiting, and allergic conditions
- Spectrum of activity: Broad spectrum, for nausea, vomiting, and allergies
- Mechanism of action: Acts as an antihistamine and antiemetic, blocking histamine receptors and reducing nausea
- Classification: Antihistamine and antiemetic
- Recommended Dosage: 12.5-25 mg orally or intravenously, as prescribed by a healthcare provider
- Basic Side Effects: Drowsiness, Dry mouth, Dizziness
- Moderate Side Effects: Blurred vision, Constipation
- Serious Side Effects: Severe allergic reactions, Rare liver issues
Phenergan Drug Class
Phenergan Connected Conditions
How to order Phenergan from our Online Pharmacy
To order Phenergan | Promethazine on our online pharmacy, all you need to do is select the required dosage and quantity of pills above. The cost of the selected pack will appear automatically. Next, add the chosen amount to your cart by clicking the Add to Cart button. You can either continue shopping for more medications or head to the checkout. At the Checkout, finalize your purchase through our secure payment gateway.
Phenergan / Promethazine pills are made using high-quality generic ingredients and are subject to strict quality control in line with WHO and Health Sciences Authority (HSA) standards. However, please note that Phenergan pills are dispatched from outside Singapore due to prescriptions issued overseas.
Disclaimer: The content on this website is provided solely for informational purposes and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions or concerns regarding your health, and never disregard or delay seeking professional advice based on the information presented here. Use of this website does not create a doctor-patient relationship, and in the event of a medical emergency, please contact your local emergency services immediately. Our website assumes no responsibility or liability for any errors or omissions in the content provided.
Reviews
First time trying Phenergan for motion sickness on a ferry from Phuket. The 25mg dose was too much. I was completely knocked out for six hours, couldn't keep my eyes open, and felt like I had glue in my brain. It worked, sure, but I missed the whole trip! Next time, I'm definitely splitting the pill into halves, maybe even quarters. It's potent stuff.
This is my emergency anti-nausea medication. It absolutely kills the urge to vomit during migraines. Lifesaver, honestly. BUT, you have to be ready to sacrifice the next 10 hours to sleep. My hack: I only take the 10mg when I know I don't have to drive or hold a meeting. And seriously, the dry mouth is intense-keep a big water bottle by your bed before it hits.
Been using promethazine on and off for chronic insomnia for almost two years now. It gets less effective the more you use it, so I cycle it with other stuff to keep my tolerance down. It gives me that lovely heavy "cotton blanket" feeling that just pulls you under. Downside is the restless legs sometimes-it's not common, but when it happens, I have to get up and walk it off.
I was prescribed 25mg for severe vertigo. It stops the spinning instantly, which is fantastic, but the grogginess lasts until noon the next day, even if I take it early. My personal trick: I take it with a high-protein snack, like yogurt or cheese. Seems to soften the initial sedation hit just enough so I don't feel utterly useless when the alarm goes off.
New user here. Took my first 10mg dose last night for seasonal allergies that kept me awake. Wow, I slept like a rock. Best sleep in months. However, when I woke up, I felt extremely agitated and fuzzy-headed, like a "hangover" without the fun part. The restless feeling faded by 11 AM, but that morning anxiety was NOT worth it if I have to work. Need to find a smaller dose.
Phenergan is a decent short-term remedy for anxiety-related nausea. It calms the stomach knot. But if you take a 25mg dose and then try to drink a cup of coffee an hour later, be prepared for a seriously unpleasant effect. It feels like the coffee amplifies the jitteriness and sedation simultaneously. Total crash. Don't mix stimulants with this, period.
The medication is excellent for acute allergic reactions when antihistamines aren't cutting it. It handles the itching and swelling well. But I found that after about six months of irregular usage, I started experiencing some very strange, vivid dreams, bordering on night terrors. It's not worth the sleep disruption unless I really need the anti-allergy power.
I use this mainly for persistent, debilitating bouts of hiccups that nothing else touches. The 25mg pill kills them dead within 30 minutes, which is amazing. BUT beware of the photosensitivity! I forgot sunscreen once after taking it and got the worst blistered sunburn on my arms within an hour of light exposure. Always wear sun protection when taking promethazine.