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DISCLAIMER: The following information is a summary and is provided to inform those who want to buy Promethazine online. This is not a substitute for medical advice. Always talk to your doctor if you have questions about your health and medications. Do not postpone seeking medical advice or delay seeking it because of this information.

Promethazine belongs to a class of medications called Phenothiazines. It functions by changing the actions of chemicals within the brain. Promethazine can also act as an antihistamine. It blocks the effects of the naturally occurring chemical histamine in the body. 

Promethazine is prescribed to treat allergy symptoms like runny nose, watery eyes, itching, sneezing, skin rashes, hives, and sneezing. It also helps to prevent motion sickness and treats pain, vomiting, and nausea after surgery. It’s also used as a sleep aid or sedative. 

Promethazine isn’t to be used in the treatment of symptoms of pneumonia, asthma, or other lower respiratory tract infections.

Buy Promethazine online from Your Canada Drug Store. We offer our customers the lowest available price to buy Promethazine online. You can buy Promethazine online through our licensed pharmacy partners world-wide. We can help you save when you buy Promethazine online as well as your other essential medications. We offer price matching so that you will pay the lowest price whenever you buy Promethazine online. Your Canada Drug Store – the most trustworthy source to buy Promethazine online. 

Here are some reasons for you to purchase from us:

  1. We are verified by Pharmacy Checker and CIPA (the Canadian International Pharmacy Association).
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  3. Our friendly and knowledgeable Customer Care Team is available for extended business hours. We are always happy to aid you with any of your prescription needs.
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Our commitment to the customer experience doesn’t stop after you’ve ordered. We guarantee you are paying the lowest price to buy Promethazine online with our price match guarantee. If for any reason you’re not happy with your Promethazine, you can use our return policy to get your money back.

Always take Promethazine exactly as instructed by your physician. Do not change anything about how you are taking this medication without talking to your doctor first. 

Promethazine is often taken before meals or at bedtime. If you use it for motion sickness, take Promethazine about 1 hour before travelling. If used for surgery, take Promethazine right before the surgery. 

The frequency and timing of your Promethazine doses will depend on the condition being treated. 

Measure liquid medicine with the dosing syringe given or using a dose-measuring spoon or cup. If you don’t have your own dose-measuring device, ask for one from your pharmacist. 

If a child uses this medication, tell the doctor if your child has any weight changes as that is what the dosage is based on. 

Promethazine can cause usual medical test results so tell any doctor or lab personnel that you are taking this medication.

Promethazine may interact with other medications in such a way that it changes how the medications work or gives you an increased risk of side effects. Give your doctor a list of all the medications and medical products you take so that they can monitor for drug interactions. 

Promethazine reacts with the following medications: 

This is not an exhaustive list of drug interactions with Promethazine. If you have further questions about drugs that interact with Promethazine contact your doctor or call us at 1-844-416-4282 and ask to speak with a pharmacist.

Along with the needed effects, Promethazine can also produce unwanted side effects. Though you won’t experience all of these side effects, they range from mild to serious and some require medical attention. Find out from your doctor which side effects are most likely and how to avoid any side effects you can. 

If the following side effects occur stop taking Promethazine immediately and seek medical attention:


These symptoms indicate neuroleptic malignant syndrome; two or more will occur together; if any of these effects occur alone they will usually not require medical attention. 

  • Convulsions (seizures)
  • Difficult or unusually fast breathing
  • Fast heartbeat or irregular pulse
  • High fever
  • High or low (irregular) blood pressure
  • Increased sweating
  • Loss of bladder control
  • Severe muscle stiffness
  • Unusually pale skin
  • Unusual tiredness or weakness

If the following Promethazine side effects occur, check with your doctor right away: 

Incidence not known

  • Abdominal or stomach pain
  • Black, tarry stools
  • Bleeding gums
  • Blood in urine or stools
  • Bloody nose
  • Blurred vision
  • Chest pain or discomfort
  • Chills 
  • Clay-colored stools
  • Confusion as to time, place, or person
  • Cough or hoarseness
  • Dark urine
  • Decreased awareness or responsiveness
  • Difficulty or troubled breathing
  • Double vision
  • Fast, pounding, or irregular heartbeat or pulse
  • Fever with or without chills
  • Fixed position of eye
  • Headache 
  • Heavier menstrual periods
  • High fever
  • Hyperexcitability 
  • Increased or decreased blood pressure
  • Increased sweating
  • Itching 
  • Loss of appetite
  • Loss of bladder control
  • Lower back or side pain
  • Mimicry of speech or movements
  • Mutism 
  • Nasal stuffiness
  • Nausea 
  • Negativism 
  • Nightmares 
  • Noisy breathing
  • Not breathing
  • Painful or difficult urination
  • Pale or blue lips, fingernails, or skin
  • Peculiar postures or movements, mannerisms or grimacing
  • Pinpoint red spots on skin
  • Seeing double
  • Seizures 
  • Severe muscle stiffness
  • Severe sleepiness
  • Shortness of breath
  • Skin rash
  • Slow or irregular heartbeat
  • Sore throat
  • Sticking out of tongue
  • Swollen glands
  • Tightness in chest
  • Tremors 
  • Uncontrolled twisting movements of neck
  • Unpleasant breath odor
  • Unusual bleeding or bruising
  • Vomiting of blood
  • Wheezing 
  • Yellow eyes or skin

Symptoms of Promethazine overdose

  • Discouragement
  • Dry mouth
  • Excessive muscle tone
  • Feeling of warmth
  • Feeling sad or empty
  • Irritability 
  • Lack of appetite
  • Loss of interest or pleasure
  • Muscle tension or tightness
  • Overactive reflexes
  • Pupils of eyes large and not moving or responding to light
  • Shakiness and unsteady walk
  • Sudden death
  • Trouble concentrating
  • Trouble sleeping
  • Unconsciousness 
  • Unusual paleness

There are side effects of Promethazine that can occur that don’t need medical attention. These will likely go away once your body has adjusted to Promethazine. 

Talk to your doctor if the following side effects persist or worsen: 

Incidence not known

  • Dizziness 
  • Drowsiness 
  • Excitation 
  • False or unusual sense of well-being
  • Hearing loss
  • Hives or welts
  • Increased sensitivity of skin to sunlight
  • Lack of coordination
  • Loss of strength or energy
  • Muscle pain or weakness
  • Redness or other discoloration of skin
  • Relaxed and calm
  • Sunburn 
  • Swelling 
  • Unable to sleep
  • Vomiting 

This list of side effects is not complete. If you notice side effects not listed here after you start Promethazine, talk to your doctor right away.