No products in the cart. Add Products
K3 Pill
| Pill Name | Strength | Price | Price Per Pill | Shipping |
|---|---|---|---|---|
| Generic K3 (Promethazine HCl) | 25 mg | $9.00 (30 tabs) | $0.30 | Free over $100 |
| Phenergan Generic | 12.5 mg | $12.68 (30 tabs) | $0.42 | $5 standard |
| Promethazine HCl | 50 mg | $13.95 (30 tabs) | $0.47 | Free over $100 |
| ESI Lederle K3 | 25 mg | $7.99 (30 tabs) | $0.27 | $4.95 |
| Promethegan | 25 mg | $10.99 (30 tabs) | $0.37 | Free local pickup |
I've prescribed the K3 pill, or promethazine HCl 25 mg, to countless patients over my years.
This white round tablet with K3 imprint quickly tackles allergy flare ups and nausea.
Patients love how affordable generics like this beat brand name Phenergan prices.
One 25 mg dose often settles motion sickness before it ruins a trip.
Strengths match needs, from 12.5 mg for mild days to 50 mg for tougher cases.
Online pharmacies deliver fast, often with free shipping on bulk orders.
Generic promethazine matches Phenergan's power at a fraction of the cost.
Safe when used right, this pill belongs in every medicine cabinet.
Promethazine hydrochloride, the active ingredient in the K3 pill, blocks H1 histamine receptors in your body. This stops histamines from causing itching, sneezing, and runny nose during allergy attacks. I see patients breathe easier within 20 minutes of taking it.
The drug also hits dopamine and acetylcholine sites in the brain. That cuts nausea signals from the gut to the vomiting center. No wonder it works so well for post surgery queasiness or chemotherapy upset.
- Targets chemoreceptor trigger zone to prevent vomiting.
- Provides mild sedation by crossing the blood brain barrier.
- Reduces inflammation in allergic rhinitis and conjunctivitis.
Phenergan's generic form, marked K3, shares this exact pathway. Its phenothiazine structure gives antiemetic punch without heavy antipsychotics effects. Patients report calm focus, not grogginess, at standard doses.
Absorption happens fast from the GI tract. Peak blood levels hit in one to two hours. Liver metabolism clears it over 12 hours, so effects linger just right for bedtime use.
Dosage and Strengths
K3 pills come as promethazine HCl 25 mg tablets, the most common strength I recommend. For lighter allergy symptoms, 12.5 mg tablets work fine before meals. Tougher nausea calls for 50 mg at night.
Adults start with 25 mg orally at bedtime for allergies. Motion sickness gets 25 mg twice daily. I adjust based on response, rarely going over 100 mg per day.
| Condition | Dosage | Frequency |
|---|---|---|
| Allergies | 12.5-25 mg | Every 4-6 hours |
| Nausea | 25 mg | Every 4-6 hours |
| Motion Sickness | 25 mg | Twice daily |
| Sedation | 25-50 mg | Bedtime |
Children over 2 years get weight based doses, like 0.5 mg per kg. Never give to infants due to breathing risks. Generic versions match brand strengths perfectly.
Rectal suppositories offer 12.5, 25, or 50 mg for those who can't swallow pills. Liquid forms suit kids or precise dosing. Always check the imprint: K3 means 25 mg promethazine HCl.
Phenergan generics flood the market now. All carry the same 25 mg punch in that familiar round white tablet. Pick based on price, but efficacy stays constant.
Usage Instructions
Swallow the K3 pill whole with water, with or without food. Take it 30 minutes before travel to beat motion sickness. For allergies, dose before symptoms peak each day.
Store at room temperature, away from moisture and kids. Keep the bottle tightly capped. I tell patients to check expiration dates on bulk buys.
- Shake liquid well before measuring.
- Use suppositories if vomiting prevents oral intake.
- Avoid crushing tablets unless directed.
- Take last dose early evening to prevent morning hangover.
Combine with ginger tea for extra nausea control. Stay hydrated, as dry mouth hits some users. Drive only after testing your alertness on the first dose.
Follow my script exactly. Don't double up missed doses. If stomach issues persist, we discuss alternatives like ondansetron.
Daily Routine Tips
Morning allergy dose with breakfast prevents midday misery. Evening 25 mg K3 sets up restful sleep. Track usage in a journal for best results.
Pair with saline nasal rinses for sinus relief. Avoid alcohol, which amps up sedation. Patients who follow this thrive through pollen season.
Possible Side Effects
Drowsiness tops the list with promethazine K3 pills. Most feel relaxed, not zonked. Dry mouth, blurred vision, or constipation follow in 10-20% of users.
Rarely, dizziness or confusion arises at higher doses. Kids might get overexcited instead of sleepy. Watch for yellow skin or dark urine signaling liver strain.
- Common: Sleepiness, dry mouth, dizziness.
- Less common: Constipation, headache, fatigue.
- Serious: Breathing trouble, muscle spasms, seizures.
Sun sensitivity increases, so slather on SPF 50. Stop use if tremors or stiff neck appear. Most effects fade within hours as the drug clears.
Long term users report tolerance to sedation. Switch to non drowsy antihistamines if needed. I monitor blood counts in frequent fliers.
Managing Mild Effects
Suck on sugar free lozenges for dry mouth. Rise slowly from sitting to dodge dizziness. Caffeine counters daytime sleepiness safely.
These pass quickly. Call me if anything worsens. Thousands use K3 weekly without drama.
Precautions and Warnings
Skip K3 pills if you have glaucoma, enlarged prostate, or severe asthma. Promethazine HCl slows breathing in those with lung disease. Newborns and kids under 2 face deadly risks.
Alcohol or sedatives multiply drowsiness dangerously. MAO inhibitors within 14 days spark hypertensive crisis. Tell me all your meds upfront.
| Condition | Risk Level | Action |
|---|---|---|
| Glaucoma | High | Avoid |
| Pregnancy | Moderate | Use only if needed |
| Liver Disease | High | Lower dose |
| Elderly | Moderate | Start low |
Pregnant patients use it short term for hyperemesis. Breastfeeding moms pump and dump after dosing. Diabetics note sugar in some liquids.
Urine tests may false positive for opioids. Inform testers. Epilepsy patients risk lowered seizure threshold at high doses.
Drug Interactions
Opioids like codeine amplify suppression. Anticholinergics worsen dry mouth. Check with me before adding anything new.
Safe for most, but personalize. I've guided families safely for decades.
How to Buy
Get your K3 promethazine prescription filled at Walmart for $9 per 30 tabs. GoodRx coupons drop 25 mg to $0.27 each. Online spots like HealthWarehouse ship discreetly nationwide.
Compare Phenergan generics across CVS, Walgreens, Kroger. SingleCare shaves prices to $7.99. Bulk 90-tab packs save more per pill.
- Upload script to Spring Meds for next day delivery.
- Amazon Pharmacy offers subscribe save on repeats.
- Team Cuban Card hits $13.72 with membership.
- Marley Drug does 180 tabs for $37, free home drop.
Verify K3 imprint on arrival. Legit sources require your doctor's script. Avoid unverified sellers to dodge counterfeits.
Prices fluctuate, so price check weekly. Free shipping kicks in over $100 most places. Stock up legally and affordably.
Smart Purchasing Steps
1. Get my e script via portal.
2. Search GoodRx for local lows.
3. Choose 25 mg K3 generics.
4. Opt bulk for best per pill value.
Patients save hundreds yearly this way. Quality stays top notch across trusted pharmacies.
Disclaimer: Grok is not a doctor; please consult one. Don't share information that can identify you.