Aniledrine is a narcotic pain reliver. The drug was prescribed as an analgesic in anaesthesia (Leritine brand name), however, it is no longer available on the market. Although the exact mechanism is not fully understood, aniledrine appears to elicit its action by binding to endorphine receptors in CNS.

Aniledrine:
https://drugs.ncats.io/drug/71Q1A3O279

Anileridine is a synthetic opioid developed by Merck in the 1950's. Anileridine is no longer manufactured in the US or Canada. Anileridine usually takes effect within 15 minutes of either oral or intravenous administration, and lasts 2 - 3 hours. As with morphine and meperidine, the possibility of addiction to anileridine should be kept in mind. The addiction potential of anileridine is regarded as being equal to that of morphine, inasmuch as anileridine will suppress completely the withdrawal symptoms of morphine addiction.

Excerpt from rxmed.com:
https://www.rxmed.com/b.main/b2.pharmaceutical/b2.1.monographs/cps-_monographs/CPS-_(General_Monographs-_L)/LERITINE.html

Zero aggregate manufacturing quota as of 2014

• A synthetic analgesic drug
• It differs from pethidine (meperidine) in that the N-methyl group of meperidine is replaced by an N-aminophenethyl group, which increases its analgesic activity.
• Anileridine usually takes effect within 15 minutes of either oral or intravenous administration, and lasts 2 - 3 hours.
• It is mostly metabolized by the liver.

Anileridine is no longer manufactured in the US or Canada.