Promethazine HCl Oral Answer need to be used with caution in patients with bone-marrow despair. Leukopenia and agranulocytosis are actually noted, usually when Promethazine (Promethazine HCl) has actually been used in Affiliation with other known marrow-toxic agents.The most typical Unintended effects are drowsiness, alterations in blood pressure,… Read More