Promethazine Hydrochloride is an antihistamine with antiemetic, sedative, and anticholinergic properties.

Applications:

• Treats nausea, vomiting, and motion sickness.

• Used as a sedative or for allergy symptoms.

• Sometimes used pre/post-surgery for nausea control.

Side Effects:

• Common: drowsiness, dry mouth, dizziness.

• Serious (rare): respiratory depression (especially in children), severe tissue damage if injected improperly.

Hyoscine/Scopolamine Hydrobromide is an anticholinergic used to prevent motion sickness and treat nausea.

Applications:

• Prevents motion sickness-related nausea and vomiting.

• Used for postoperative nausea and in palliative care to reduce secretions.

Side Effects:

• Common: dry mouth, drowsiness, blurred vision, and dizziness.

• Serious (rare): confusion, hallucinations, and urinary retention.