Is Pregabalin the Same as Gabapentin? Patients suffering from spinal cord injury (SCI) find it difficult to lead their normal lives. There can be certain reasons for SCI, such as anxiety disorders, depression, and sleep disorders, and these factors have severe effects on your daily life. Pregabalin and Gabapentin turn out to be the best cures for neuropathic pain; however, they both vary in their effectiveness.
What are Pregabalin and Gabapentin?
Neuropathic pain (pain from damaged nerves) caused by postherpetic neuralgia and diabetic peripheral neuropathy has an intense impact on a human’s life; so far, Pregabalin and Gabapentin are found to be the first-rate treatment for such cases. Both Pregabalin and Gabapentin are primarily anticonvulsant drugs (or convulsant is a sudden, harsh, uncontrollable movement of the body caused by involuntary contraction of muscles, which is linked with brain disorders like epilepsy, may be in the presence of certain body toxins. Besides treating neuropathic pain, these drugs are also used to treat low back pain, sciatica, and migraine.
Here, we will understand what pregabalin and gabapentin are and determine whether pregabalin is the Same as Gabapentin.
Uses of Pregabalin and Gabapentin
Pregabalin and Gabapentin help the patient treat neuropathic pain that creates burning, stabbing aches that may persist for months or years after attacks of shingles that may occur in your arms, hands, fingers, feet, legs, and toes. The drug comes in three forms: capsules, oral solutions, and extended-release or long-lasting tablets.
An oral form or a capsule form is used to relieve pain that occurs due to spinal cord injury, and pregabalin capsules and oral solutions are also used to relieve neuropathic pain that can occur after a spinal cord injury and to treat fibromyalgia (a long-lasting illness that may cause aches, muscle stiffness, tenderness, tiredness, and difficulty sleeping). The capsules and oral solutions treat various types of seizures in adults and children aged 1 month and older.
These medicines help decrease or suppress the pain signals released by damaged nerves in the body.
Is Pregabalin the same as Gabapentin? Well, the functioning of the two drugs is the same; however, if there is any difference, we will know this further.
How does Pregabalin differ from Gabapentin?
Is. is pregabalin the Same as Gabapentin? GABA (gamma-aminobutyric acid) is the amino acid source of Pregabalin and Gabapentin. Pregabalin is an active S-enantiomer of 3-aminomethyl-5-methyl-hexonic acid and has similar pharmacological activity to gabapentin. These drugs belong to a class resembling the alpha-2-delta protein in the CNS. Also, they have the same effectiveness in neuropathic disorders.
Though pregabalin shows equivalent efficacy to Gabapentin, between these two, Pregabalin has only received approval from the TGA for the management of diabetic peripheral neuropathy and post-herpetic neuralgia.
Besides this, Pregabalin can work at a lower dosage for neuropathic pain. The reason is that a low dosage of this drug has much higher bioavailability (around 90%, while Gabapentin has only 33- 60%, and it is rapidly absorbed in a maximum of 1 hour.
Including this, Pregabalin increases plasma concentrations in your body with increasing dose, which is not true with Gabapentin, as it takes 3-4 hours post-dose to be absorbed into the body. Talking about plasma concentrations, Gabapentin shows a non-linear relationship to increasing doses.
Other than the above advantages, Pregabalin shows distinguishing merits over Gabapentin, which are:
Pregabalin shows greater potency in pain and seizure disorders and greater analgesic activity in rodent models of neuropathic pain (as per a study done by Fehrenbacher et al). The study done by M. Vera-Llonch et al concluded that Pregabalin provides better analgesic outcomes than Gabapentin in a 12-week period only.
Further, D. Wesche et al studied that pregabalin has higher plasma concentrations than gabapentin and is 2.5 times more potent than Gabapentin.
in pharmacokinetic terms, pregabalin has distinguishing advantages over gabapentin.
| Feature | Pregabalin | Gabapentin |
|---|---|---|
| Drug class | Gabapentinoid / anticonvulsant | Gabapentinoid / anticonvulsant |
| Common uses | Neuropathic pain, fibromyalgia, and certain seizure disorders | Neuropathic pain, postherpetic neuralgia, and certain seizure disorders |
| How it works | Binds to the α2δ subunit of voltage-gated calcium channels, reducing release of certain neurotransmitters | Acts on the α2δ subunit of voltage-gated calcium channels and reduces excitatory neurotransmitter release |
| Absorption | More predictable and dose-proportional absorption | Absorption becomes less predictable as the dose increases |
| Dosing frequency | Often taken 2–3 times daily, depending on the condition and formulation | Often taken 2–3 times daily |
| Onset of effect | May provide symptom relief relatively quickly in some patients | Response varies depending on the condition and individual |
| Common side effects | Dizziness, sleepiness, blurred vision, swelling, weight gain | Dizziness, sleepiness, fatigue, and swelling |
| Weight gain | Can occur | Can occur |
| Withdrawal risk | Stopping suddenly can cause withdrawal symptoms; gradual reduction is generally recommended | Stopping suddenly can also cause withdrawal symptoms; gradual reduction is generally recommended |
| Kidney function | Dose adjustment may be required with reduced kidney function | Dose adjustment may be required with reduced kidney function |
| Controlled-substance status | Controlled in some countries, including the U.S. | Controlled in some countries, including the U.S. |
| Drug interactions | Relatively few pharmacokinetic interactions, but additive sedation can occur with CNS depressants | Relatively few pharmacokinetic interactions, but additive sedation can occur with CNS depressants |
| Generic availability | Available as a generic | Available as a generic |
Side Effects of Pregabalin and Gabapentin
You need to make sure of the side effects before starting your treatment with Pregabalin and Gabapentin:
- Drowsiness or lightheadedness
- Dizziness
- Tiredness
- Headache
- Involuntary movement of the body parts
- Blurred vision
- Anxiety, stress
- Memory illness – difficulty in remembering things
- Difficulty in concentrating
- Lack of balance
- Lack of coordination
- Unusual thoughts
- Vomiting and nausea
- Uncontrollable eye movements
- Indigestion and Diarrhea
- Dryness in mouth
- Obesity and fatigue
- Swelling of hands, feet, lower legs
- Back pains
- Pain in joints
- Slurred speech
- Bloating
- High or elevated mood
- Fever
- Runny nose
- Sore throat
- Flu-like signs
- Ear pain
- Runny nose, sneezing
- Cough, sore throat
- Flu-like symptoms
Warnings and Precautions
When getting surgery, like dental surgery, inform your doctor about taking Pregabalin or Gabapentin.
Avoid taking alcohol while taking these medications, as there can be a drug interaction that causes drowsiness.
If you are on medication for mental illness or epilepsy, inform your doctor if there are side effects. Pregabalin and Gabapentin may have unexpected changes on your mental health, such as suicidal ideation or suicidal attempts.
If you are going to start the Pregabalin course, you must mention the following medicines (if you are taking one of them already):
- Benazepril
- Quinapril
- Moexipril
- Opioid
- Accuretic
- Ramipril
- Sleeping pills or tranquillisers
- Rosiglitazone
- Morphine
- Captopril
Key Takeaways on Pregabalin and Gabapentin
Is pregabalin the Same as Gabapentin?
Pregabalin and Gabapentin are effective for related pain disorders other than shingles and diabetes. Consult your doctor before taking them as a painkiller.
Around 40% of patients suffering from post-herpetic neuralgia or diabetic peripheral neuropathy find a 50% improvement in their health with these drugs when taken for 8 weeks or longer. When consulting a doctor regarding the course of Pregabalin or Gabapentin, it is advised to discuss your medical history, such as any medications you are already taking or illnesses, with your doctor.
When taking these neuropathic drugs, you may feel dizzy, drowsy, or experience peripheral oedema or gait disturbance. If the situation continues, discuss this with your doctor. If the situation worsens, stop the medicine immediately and consult your doctor.
