Gelper drug

This article is about a substance in Kamen Rider, the original series.

The Gelper drug (ゲルパー薬, Gerupā-yaku) is a drug that was developed by Gel Shocker to ensure no betrayal among their Combatmen. Once the drug was introduced into their systems, they would need to take it every three hours lest they combust, making capturing them for information more difficult than their Shocker predecessors. ^{[Gel Shocker's Debut! The Last Day of Kamen Rider!!]}