Haris
So, you have come across the name Alidine and you are wondering what it actually is. The short answer is that Alidine is a brand name for anileridine, a synthetic opioid analgesic used for the relief of moderate to severe pain.
Alidine is a prescription-only medicine in the UK, derived from pethidine (meperidine). It was developed as a painkiller with a faster onset of action than morphine. In this guide, we will cover what Alidine is, how it works, its uses, dosage, side effects, and its current status in the UK.
What Is Alidine?
Alidine is the brand name for anileridine, a synthetic opioid analgesic belonging to the piperidine class of drugs. It is a derivative of pethidine and was developed as a potent painkiller with a faster onset of action.
The chemical name for anileridine is ethyl 1-[2-(4-aminophenyl)ethyl]-4-phenylpiperidine-4-carboxylate. It has the molecular formula C22H28N2O2 and a molecular weight of 352.48. Alidine is also known by other names including Anileridina, Anileridinum, Apidol, Apodol, Leritin, and Nipecotan.
In the UK, Alidine was marketed by Duncan, Flockhart & Co. and became available as a valuable narcotic analgesic.
How Does Alidine Work?
Alidine works by binding to opioid receptors in the brain and spinal cord. This blocks the transmission of pain signals and alters the brain’s perception of pain.
As a synthetic opioid, Alidine produces analgesia (pain relief) similar to that of morphine and pethidine. It is considered a potent analgesic, with 40 mg of anileridine providing approximately the same analgesic effect as 100 mg of pethidine.
Uses of Alidine
Alidine is used for the management of moderate to severe pain. It is typically administered in a hospital setting or under close medical supervision.
Approved Uses
- Relief of moderate to severe acute pain
- Post-operative pain management
- Pain associated with trauma or injury
- Pain in palliative care settings
Off-Label Uses
Like many opioids, Alidine may sometimes be used off-label for other types of pain, but this would be at the discretion of a specialist.
Dosage and Administration
Alidine is available as a solution for injection. It is administered by healthcare professionals via intramuscular or subcutaneous injection. The typical dose for analgesia is 25-50 mg, repeated as necessary.
The dosage depends on the severity of pain, the patient’s response, and their medical history. As with all opioids, the lowest effective dose should be used for the shortest duration possible.
Side Effects of Alidine
Like all opioids, Alidine can cause side effects. The most common side effects are similar to those of pethidine.
Common Side Effects
- Drowsiness and sedation
- Nausea and vomiting
- Constipation
- Dizziness
- Sweating
- Dry mouth
Serious Side Effects
- Respiratory depression – both drugs cause respiratory depression of similar severity and duration
- Allergic reactions
- Dependence and addiction
- Seizures (especially at high doses)
- Confusion or hallucinations
The sedative effect of Alidine is still debated, with conflicting clinical reports.
Alidine vs Pethidine: A Comparison
Alidine is a derivative of pethidine and shares many of its properties. However, there are some key differences.
[Table: comparison of Alidine and Pethidine]
| Feature | Alidine (Anileridine) | Pethidine (Meperidine) |
| Potency | 40 mg = 100 mg pethidine | Reference |
| Onset of action | Faster | Slower |
| Respiratory depression | Similar severity and duration | Similar |
| Sedative effect | Unclear; conflicting reports | Established |
| Side effects | Similar | Similar |
History of Alidine in the UK
Alidine (anileridine hydrochloride) was introduced in Britain by Duncan, Flockhart & Co. It has been used long enough to establish that it is a valuable narcotic analgesic.
However, like many older opioids, its use has declined with the development of newer painkillers. Today, Alidine is less commonly prescribed than morphine, oxycodone, or fentanyl. It remains available in some countries but is not a first-line treatment.
Alidine and Addiction
Alidine is a controlled substance due to its potential for abuse and addiction. It is classified as a Schedule 2 controlled drug under the Misuse of Drugs Act 1971 in the UK. This means it is available only on prescription and is subject to strict controls.
Long-term use of Alidine can lead to physical and psychological dependence. Withdrawal symptoms may occur if the drug is stopped abruptly. Patients should only use Alidine under the supervision of a healthcare professional.
FAQ
Q: What is Alidine?
Alidine is a brand name for anileridine, a synthetic opioid analgesic used for moderate to severe pain. It is a derivative of pethidine and was developed for its fast onset of action.
Q: Is Alidine still available in the UK?
Alidine is a prescription-only medicine in the UK. While it may still be available, it is not commonly used as a first-line treatment and has largely been replaced by newer opioids.
Q: What is the dosage of Alidine?
The typical dose of Alidine is 25-50 mg administered by injection. 40 mg of anileridine provides approximately the same analgesic effect as 100 mg of pethidine.
Q: What are the side effects of Alidine?
Common side effects include drowsiness, nausea, constipation, and dizziness. Serious side effects include respiratory depression, dependence, and allergic reactions.
Q: Is Alidine addictive?
Yes, Alidine is a controlled substance with a potential for abuse and addiction. It is classified as a Schedule 2 drug under the Misuse of Drugs Act 1971 in the UK.
Q: How does Alidine compare to morphine?
Alidine is a synthetic opioid with a faster onset of action than morphine. Both are potent painkillers, but morphine is more commonly used in the UK.
Q: Can I buy Alidine over the counter?
No. Alidine is a prescription-only medicine and cannot be purchased over the counter in the UK.
Q: What should I do if I experience side effects from Alidine?
If you experience severe side effects such as difficulty breathing, severe drowsiness, or signs of an allergic reaction, seek emergency medical help immediately.
