Tag: Nystagmus

Phencyclidine (PCP) intoxication commonly presents with both nystagmus and dilated pupils, with a specific type of nystagmus (rotary) being a key diagnostic feature. Identifying what drug causes nystagmus and dilated pupils is crucial for healthcare providers in emergency settings to diagnose and manage potential drug toxicity or overdose.

Medication-induced nystagmus is one of the most common causes of acquired involuntary eye movements. It occurs when certain drugs interfere with the central nervous system pathways that control eye movement, leading to rapid, repetitive motions. This can be a sign of toxicity or an adverse reaction, especially with certain classes of medication, such as anticonvulsants and sedatives.

According to the National Poison Data System, miosis and nystagmus are among the most common ocular effects reported after drug exposure [1.2.2]. While many substances cause one or the other, understanding **which drug causes miosis and nystagmus** simultaneously is critical for diagnosis.

During clinical trials for nerve pain, blurred or double vision was reported by at least 1 in 50 participants, demonstrating that gabapentin can affect eyesight. Understanding the full spectrum of potential visual side effects, from mild to severe, is essential for patient safety while taking this medication.