**Core Concept**
Succinylcholine is a depolarizing neuromuscular blocking agent used in anesthesia to facilitate endotracheal intubation and provide skeletal muscle relaxation during surgery. Its administration can lead to various complications, including cardiovascular and neurological effects. The potential complications of succinylcholine are crucial to understand for safe clinical practice.

**Why the Correct Answer is Right**
Succinylcholine can cause an increase in intraocular pressure (IOP) and intracranial pressure (ICP) due to its effect on the muscarinic receptors, leading to the contraction of the muscles of the eye and the cranial muscles. This can be particularly concerning in patients with glaucoma or other conditions where increased IOP can be detrimental. Additionally, succinylcholine can lead to a decrease in heart rate due to its vagolytic effect, which can be mitigated with the administration of anticholinergic agents. However, it does not typically cause an increase in blood pressure (BP) as a direct complication of its administration.

**Why Each Wrong Option is Incorrect**
**Option A:** Increased IOP is indeed a recognized complication of succinylcholine, making it an incorrect choice.

**Option B:** Increased ICP can also occur with succinylcholine, particularly in patients with head trauma or other conditions where increased intracranial pressure is a concern.

**Option D:** Decreased heart rate can be seen with succinylcholine due to its vagolytic effect, which can be managed with anticholinergic agents.

**Clinical Pearl / High-Yield Fact**
When administering succinylcholine, it is essential to carefully monitor patients, particularly those with a history of glaucoma or increased intracranial pressure, and be prepared to manage potential complications such as increased IOP and ICP.

**Correct Answer Line**
✓ Correct Answer: C. increased BP