Promethazine works by blocking the histamine H1 receptor. Histamine is a chemical in the body that causes itching, sneezing, tearing, and a runny nose.
Promethazine works by preventing histamine from binding to the body sites that trigger allergic symptoms.
You may experience:
Headache
Drowsiness
Nightmares
Dry mouth
You may eat normally while taking promethazine.
Alcohol can worsen dizzy side effects. Consumption of alcohol is therefore not recommended.
If you forget to take your prescription, take it as soon as you remember.
If you miss a dose, don’t take a double dose.
If your next dose is approaching, skip the missed dose and take the next one.
Alcohol can worsen this effect.
If you take promethazine for an extended period, your doctor or pharmacist will taper down your dose to manage any uncomfortable side-effects (difficulty sleeping, sweating)
Promethazine hasn’t been proven to affect sexual performance, fertility or contraceptives.
You may use this medication in pregnancy. It is advisable to use non-drowsy anti-allergic medications.
You shouldn’t use this medication without a prescription from your doctor if you are breastfeeding.
Promethazine can be found in breastmilk and your baby may experience drowsiness or difficulty breathing.
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