Atropine is contraindicated in what conditions?

Atropine is contraindicated in conditions such as glaucoma, particularly narrow-angle glaucoma, where it can increase intraocular pressure. It is also contraindicated in patients with myasthenia gravis, as it can exacerbate muscle weakness. Additionally, atropine should be avoided in cases of obstructive uropathy or gastrointestinal obstruction, where its anticholinergic effects could worsen the situation.