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Doctor insights on: Promethazine Dosages

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What is a safe dosage for promethazine hydrochloride?

What is a safe dosage for promethazine hydrochloride?

Promethazine: 25mg every 6 hours would be my maximum dosage. This may make you drowsy however. Be careful taking other medications at the same time. ...Read more

Dr. Syed H. Sajid
172 doctors shared insights

Promethazine (Definition)

Prevents and controls motion sickness, nausea, vomiting, and dizziness. Also used to relieve or prevent allergic reactions, helps people go to sleep, and control their pain or anxiety before or after ...Read more


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Is it safe to take 45mg of promethazine for sedation ? What is maximum safe dosage for sedation ?

Is it safe to take 45mg of promethazine for sedation ? What is maximum safe dosage for sedation ?

50 mg.: 50 mg is the max safe dose of promethazine for ANY indication, including sedation. I notice that you also take diazepam and sertraline. All three of these drugs can cause sedation, loss of coordination & increased reaction time when driving. Sertraline can increase promethazine levels & drug effect. You need to ask your doctor about this. Meanwhile, please don't take ANY promethazine. ...Read more

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Can I give my 3 year old promethazine for vomiting. If so, what is the dosage?

No: Before giving meds, you need to talk to your md. He/she may want to determine the cause of the vomiting. If your child has appendicitis, for example, you will only be delaying the diagnosis and put your child's health at risk. In any event, most pediatricians would not use Promethazine in a 3 year old at this time. ...Read more

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I Accidentally Gave my 35 lb 3 year-old 1 tsp phenergan (promethazine) dm. The dose is suppose to be 1/2. She acts fine should i be worried?

Mgt: If she is otherwise well,it should be alright. If you do notice any changes,please contact your PCP Nasal saline rinses are effective in relieving congestion without the potential side effects. ...Read more

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Promethazine syrup effect?

Promethazine syrup effect?

Multiple effects: Promethazine is a potent antihistamine that can cause dizziness, drowsiness, dry mouth, nausea, vomiting, weakness and occasionally more serious central nervous system side effects. It is usually well tolerated in most people. ...Read more