The tablets & syrup are similar, but there are at least two types of the syrup that I am aware of. One has promethazine combined with dextromorphan which is promethazine DM similar to robitussin DM & the other is combined with codeine. So I say the tablets are similar but different due to the other ingredients in the two forms of syrup.
- Promethazine Information for Consumers
- Promethazine Information for Healthcare Professionals (includes dosage details)
- Side Effects of Promethazine (detailed)
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