Promethazine HCl occurs as a white to faint yellow, practically odorless, crystalline powder, which slowly oxidizes and turns blue on prolonged exposure to air. It is soluble in water and freely soluble in alcohol.Also asked, how long does promethazine take to dissolve?
For Promethazine this is (5.5 x 10 hours) two days to (5.5 x 19) four days approximately to be eliminated from your system. Metabolism, age, health, weight and the amount and frequency of the drug taken, are all factors that can affect the rate at which the body can clear the drug from your system.
Also Know, how quickly does Phenergan work? Promethazine will start to make you feel sleepy around 20 minutes after you take it and may work for up to 12 hours. If you're taking it for a cough or cold, allergies or nausea, your symptoms should start to improve within 20 minutes. The medicine should work for around 4 to 6 hours.
Also question is, can you dissolve Phenergan in water?
Promethazine HCl occurs as a white to faint yellow, practically odorless, crystalline powder which slowly oxidizes and turns blue on prolonged exposure to air. It is freely soluble in water and soluble in alcohol.
Can Phenergan have the opposite effect?
Antihistamines, including promethazine (for example, Phenergan®) or trimeprazine (for example, Vallergan®), aren't recommended for helping children sleep, unless you use them under the supervision of your doctor. Antihistamines can also have the opposite effect, causing some children to become hyperactive.
How long does Phenergan suppository take to dissolve?
Remain lying down for a few minutes after using this medication, and avoid having a bowel movement for an hour or longer so the drug will be absorbed. The suppository is for rectal use only. For motion sickness, the first dose of promethazine should be used 30 to 60 minutes before beginning travel.What is the highest mg of promethazine?
The average effective dose of promethazine HCl for the active therapy of nausea and vomiting in children or adults is 25 mg. 12.5- to 25-mg doses may be repeated, as necessary, at 4- to 6-hour intervals.Can I take Phenergan every day?
Take this medication by mouth with or without food as directed by your doctor, usually 2 to 4 times daily. For motion sickness, the first dose of promethazine should be taken 30 to 60 minutes before beginning travel. For allergies, this medication may be taken once daily at bedtime to avoid being drowsy during the day.Is Phenergan the same as promethazine?
Promethazine is the generic form of the brand-name drug Phenergan, used as an antihistamine, sedative, and anti-nausea drug. Your doctor may also prescribe promethazine to relieve allergy symptoms like runny nose and watery, red eyes, or prevent and treat motion sickness.Is Phenergan safe?
Phenergan can cause severe breathing problems or death in very young children. Carefully follow your doctor's instructions when giving this medicine to a child of any age. Phenergan can cause side effects that may impair your thinking or reactions.Can Phenergan be used as a sleep aid?
Promethazine is used to treat several conditions, including allergies, motion sickness, nausea and vomiting, anxiety before surgery, and pain after surgery. It's also used as a sleep aid, including before and after surgery.What is the difference between Zofran and Phenergan?
Zofran and Phenergan belong to different drug classes. Zofran is an antiemetic (anti-nausea and vomiting) and selective 5-HT3 receptor antagonist and Phenergan is an antihistamine. Side effects of Zofran and Phenergan that are similar include dizziness, drowsiness, constipation, and blurred vision.Is Phenergan bad for your heart?
Heart rate disturbances, dry mouth, confusion, tinnitus (a ringing in the ears), double vision, anxiety, and dizziness have also been reported. Rarely, respiratory depression (unusually slow and shallow breathing); children are more at risk. Avoid in children aged less than 2 years. 
