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2,5 –Dimethylfentanyl

Phenaridine2,5 –Dimethylfentanyl, otherwise known as Phenaradine, is a powerful opioid drug and analogue of the medical painkiller fentanyl. It is used for surgical anaesthesia and was first developed in 1972.

This drug is slightly less potent than fentanyl in rat models than fentanyl. However it is still many times more powerful than other opioid painkillers like morphine or heroin.

The “high” or physical euphoria of fentanyl analogues is not considered to be as intense as morphine or heroin.

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Fentanyl analogues have been responsible for many deaths by overdose. The most recent surge in their use can be traced back to Estonia in the early 2000s. More recently they have been responsible for a large number of deaths in the USA.

In comparison to other opiates, fentanyl and its analogues like 2,5 –Dimethylfentanyl produce greater pain relief.

Side effects include itching, sedation, difficulty concentrating, constipation, loss of libido, difficulty urinating, loss of appetite, sweats and intense nightmares.

The most dangerous side effect is the ability to produce a heavy respiratory depression in comparison to other opiates.

This dangerous side effect combined with the miniscule dose required for activity is what makes drugs like 2,5 –Dimethylfentanyl so lethal.

It is considered highly dangerous to mix 2,5 –Dimethylfentanyl or other fentanyl analogues with depressant drugs. Such drugs include alcohol, benzodiazepines, GHB/GBL, barbiturates and methqualone. This combination is likely to increase muscle relaxation, sedation and amnesia and cause unanticipated loss of consciousness in combination with heavily suppressed breathing. In this state there is an increased risk that the individual will vomit and then block their airways by inhaling their vomit leading to death by asphyxiation.

In the case of such a loss of consciousness or overdose, the person should be first placed in the recovery position, and then emergency services should be contacted. The recovery position involves laying the person on their side, with their head leaning towards the ground in order to aid breathing and prevent inhalation of vomit. If possible, naloxene should be administered. This is an opioid antagonist that will reverse the effects of the fentanyl drug or fentanyl analogue like 2,5 –Dimethylfentanyl. It is generally administered intravenously or intramuscularly.

2,5 –Dimethylfentanyl is considered to be extremely addictive with a high potential for abuse. It has the capability of producing strong psychological dependence in some users, and physical dependence with repeated administration.

Once addiction has fully developed, withdrawal symptoms and cravings will manifest if a person attempts to stop using the drug.

The withdrawal symptoms form fentanyl and its analogues are particularly horrible. Symptoms of withdrawal include strong cramping and pain in the muscles, profuse vomiting and strong nausea, fatigue and listlessness, depression, anxiety, racing thoughts, nightmares, fever, headache, cold seats, physical unease and discomfort and insomnia.

These symptoms start soon after the last dose, and continue for a few days before subsiding. Former users who have just become clean and free from the drug are at high risk of relapse in this period. Many deaths result from this relapse due to a loss of former tolerance and subsequent overdose.