Final answer:
Scopolamine patches are contraindicated for patients with glaucoma as they can increase intraocular pressure, worsening the condition.
Step-by-step explanation:
The question asks which patients should not be prescribed a scopolamine patch for severe postoperative nausea and vomiting (PONV). Scopolamine, derived from the Atropa genus, is commonly used to alleviate motion sickness and is considered safe in the controlled release provided by a patch. However, it is contraindicated for patients with certain conditions.
Patients with glaucoma should not use scopolamine patches due to the risk of increased intraocular pressure, which can aggravate the condition. While patients with motion sickness or PONV can benefit from this treatment, and it's not typically prescribed for labyrinthitis, the critical consideration here is glaucoma.