A patient came to the casualty with acute attack of asthma after starting treatment of glaucoma. The causative drug is
**Core Concept**
The patient's acute asthma attack is likely caused by a medication that affects the parasympathetic nervous system, leading to increased bronchial smooth muscle contraction and airway constriction. This is a classic example of a drug-induced side effect in a patient with a pre-existing condition.
**Why the Correct Answer is Right**
The causative drug is likely to be pilocarpine or latanoprost, which are used to treat glaucoma. These medications stimulate the parasympathetic nervous system by activating muscarinic receptors, leading to increased aqueous humor outflow and decreased intraocular pressure. However, in a patient with asthma, this stimulation can cause bronchospasm and airway constriction, leading to an acute asthma attack.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a medication commonly used to treat glaucoma.
* **Option B:** This option is incorrect because it mentions a medication that is not commonly used to treat glaucoma.
* **Option C:** This option is incorrect because it mentions a medication that is not typically associated with parasympathetic stimulation.
**Clinical Pearl / High-Yield Fact**
When treating patients with pre-existing conditions, it's essential to consider potential drug interactions and side effects. In this case, medications used to treat glaucoma can exacerbate asthma symptoms in susceptible patients.
**Correct Answer: C. Pilocarpine or Latanoprost**