Pregabalin for Anxiety: How It Compares to Traditional Benzodiazepines
Pregabalin is used for generalised anxiety disorder (GAD) in adults and works differently from traditional benzodiazepines such as diazepam or alprazolam.
Originally developed for nerve pain and epilepsy, pregabalin represents a different approach to anxiety management. This guide explains how it works and how its effects and risks compare with benzodiazepines.
- What pregabalin is
- How pregabalin works for anxiety
- Key differences from benzodiazepines
- Common side effects and risks
- Who may be suitable for treatment
- How pregabalin is taken and stopped
What Is Pregabalin?
Pregabalin, sold under brand names including Lyrica, belongs to a class of medicines called gabapentinoids.
It was originally developed for conditions involving nerve pain and epilepsy. It was later approved in the UK for the treatment of generalised anxiety disorder in adults.
Unlike benzodiazepines, pregabalin does not work through the same receptors in the brain. This gives it a different mechanism of action and a different side-effect profile.
How Does Pregabalin Work for Anxiety?
Pregabalin binds to a specific subunit of voltage-gated calcium channels in the central nervous system. This can reduce the release of several neurotransmitters involved in nerve signalling.
Benzodiazepines enhance the activity of GABA, while pregabalin works by modulating calcium channels and reducing the release of certain excitatory neurotransmitters.
The resulting reduction in excessive nerve signalling can help with both physical symptoms of anxiety, such as tension and trembling, and psychological symptoms such as persistent worry and feeling on edge.
Pregabalin vs Benzodiazepines: Key Differences
Mechanism of Action
Benzodiazepines enhance the effects of GABA at the GABA-A receptor. Pregabalin works through voltage-gated calcium channels, reducing the release of certain neurotransmitters.
Onset of Action
Pregabalin can begin improving anxiety symptoms relatively quickly in some patients. Clinical studies have reported meaningful improvement during the early stages of treatment.
Risk of Dependence
Benzodiazepines are associated with physical dependence, particularly with regular or prolonged use. Pregabalin can also cause dependence and withdrawal symptoms, so it should not be stopped suddenly after regular use.
Cognitive Effects
Benzodiazepines can cause memory problems, impaired concentration and mental fogginess. Pregabalin can also cause drowsiness and dizziness, although the cognitive effects may differ between individuals and medicines.
Side Effect Profile
Common Effects of Pregabalin
- Dizziness and lightheadedness
- Drowsiness and fatigue
- Dry mouth
- Blurred vision
- Weight gain
- Swelling of the hands, legs or feet
Common Effects of Benzodiazepines
- Drowsiness and sedation
- Dizziness and impaired coordination
- Memory problems
- Muscle weakness
- Dependence and withdrawal symptoms
The effects vary from person to person. Pregabalin can be particularly associated with dizziness and weight gain, while benzodiazepines are more commonly associated with sedation, impaired coordination and cognitive effects.
Who Is Pregabalin Suitable For?
- Have generalised anxiety disorder that has not responded adequately to other treatments.
- Experience significant physical symptoms of anxiety along with persistent worry.
- Are concerned about some of the cognitive effects associated with benzodiazepines.
- Require a medication that can begin working relatively quickly.
- Have co-existing nerve pain where pregabalin may address more than one condition.
- Are particularly concerned about weight gain.
- Have kidney problems, because pregabalin is primarily cleared by the kidneys.
- Have significant dizziness or balance problems.
How Is Pregabalin Taken?
Pregabalin for anxiety is generally started at a low dose and adjusted according to response and tolerability. The exact dose should be determined by the prescribing healthcare professional.
Regular use is important
Unlike some benzodiazepines that may be prescribed for acute episodes of anxiety, pregabalin is generally taken regularly. Consistent use helps maintain a steady effect.
Stopping Pregabalin
If pregabalin has been taken regularly, it should not normally be stopped suddenly without medical guidance.
Withdrawal symptoms can include anxiety, insomnia, nausea, headaches and sweating. A healthcare professional can recommend an appropriate gradual reduction in dose when treatment needs to be discontinued.
The Bottom Line
Pregabalin offers a different treatment approach for adults with generalised anxiety disorder. It works through a mechanism that differs from benzodiazepines and may provide relatively rapid improvement for some patients.
However, pregabalin is not free from risks. Dizziness, drowsiness, weight gain and physical dependence can occur, and stopping treatment suddenly can cause withdrawal symptoms.
The choice between pregabalin, benzodiazepines and other anxiety treatments depends on individual symptoms, medical history, previous treatment response and other medicines being taken. Discuss these factors with your doctor or pharmacist.
