There is no set rule. There are many different manufacturers of promethazine out there and different drugs are often used in combination with promethazine eg. decongestants, cough suppressants. Colours include clear, yellow, purple and others.
Visit your pharmacy for more information.
- Promethazine Information for Consumers
- Promethazine Information for Healthcare Professionals (includes dosage details)
- Side Effects of Promethazine (detailed)
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