Vardenafil and Pregabalin: Can They Be Taken Together?

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What Is Vardenafil and How Does It Work?

Vardenafil is a prescription medicine used to treat erectile dysfunction (ED) in adult men. It is the generic version of Levitra and belongs to a group of medicines called PDE5 inhibitors [5]. Vardenafil works by relaxing blood vessels in the penis, allowing more blood to flow in when you are sexually aroused. This helps you get and keep an erection suitable for sexual activity.

Vardenafil is usually taken about 25 to 60 minutes before sexual activity, and the effect can last for several hours [5]. It comes in 5mg, 10mg, and 20mg tablets, and your prescriber will recommend the right dose for you based on your health and other medicines. Vardenafil does not work without sexual stimulation, and you should not take it more than once a day.

Common side effects include headache, flushing, indigestion, and nasal congestion [5]. Vardenafil is not suitable for everyone, particularly if you take certain medicines for chest pain (nitrates, nicorandil) or have severe heart problems. Your prescriber will check your suitability during the online consultation.

What Is Pregabalin and Why Is It Prescribed?

Pregabalin is a prescription medicine used to treat nerve pain (neuropathic pain), epilepsy, and generalised anxiety disorder. It works by calming overactive nerve signals in the brain and nervous system. Pregabalin is often prescribed for conditions such as diabetic nerve pain, pain following shingles, fibromyalgia, and as an add-on treatment for certain types of seizures.

Pregabalin is usually taken two or three times a day, with or without food. The dose varies depending on the condition being treated and how you respond to the medicine. Common side effects include dizziness, drowsiness, headache, dry mouth, and weight gain. Because pregabalin can cause drowsiness and affect concentration, you should not drive or operate machinery until you know how it affects you.

Pregabalin is a controlled medicine (Schedule 3) in the UK, meaning it has stricter prescribing and supply rules. You should never stop taking pregabalin suddenly without medical advice, as this can cause withdrawal symptoms. Always take pregabalin exactly as your doctor has prescribed.

When to get urgent help

• Erection lasting more than four hours (priapism)—go to A&E immediately
• Sudden loss of vision or hearing—stop vardenafil and seek urgent medical help
• Chest pain during or after sex—stop activity, call 999 if pain does not ease quickly
• Severe dizziness or fainting—sit or lie down and contact your GP or call 111
• Allergic reaction (rash, swelling, difficulty breathing)—call 999

Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.

Can You Take Vardenafil and Pregabalin Together?

There is no major direct pharmacological interaction commonly reported between vardenafil and pregabalin. This means that, for most men, taking these two medicines together is not expected to cause a dangerous reaction or significantly alter how either medicine works. However, this does not mean the combination is automatically suitable for everyone.

Both vardenafil and pregabalin can cause dizziness, and pregabalin commonly causes drowsiness. When taken together, these side effects may add up, making you feel more light-headed or unsteady than you would with either medicine alone. This is particularly important if you are new to either medicine or if your dose has recently been increased.

Your prescriber will review your full medication list, including pregabalin, during the online consultation before approving vardenafil. They will check for any other medicines or health conditions that might affect your suitability for ED treatment. You should always declare every medicine you take, including over-the-counter products and supplements, to ensure safe prescribing.

How the Interaction Works in Plain English

Vardenafil lowers blood pressure slightly as part of how it works to improve blood flow to the penis. Pregabalin does not directly lower blood pressure, but it can cause dizziness and drowsiness by affecting nerve signals in the brain. When you take both medicines, the dizziness from pregabalin and the mild blood-pressure effect from vardenafil can combine, making you feel more unsteady, especially when you stand up quickly or after drinking alcohol. This is not a dangerous interaction in the way that vardenafil and nitrates would be, but it does mean you need to be cautious and aware of how you feel.

What Your Prescriber Checks Before Approving Vardenafil

When you request vardenafil through an online consultation at Cured Pharmacy, a UK-registered prescriber reviews your answers to check whether the medicine is safe and suitable for you. They will ask about all your current medicines, including pregabalin, to identify any interactions or contraindications. The prescriber will also check your medical history, including heart conditions, blood pressure, liver or kidney problems, and any previous reactions to ED medicines.

If you take pregabalin, the prescriber will consider whether you experience significant dizziness or drowsiness, as this may influence the starting dose or advice given. They will also check for any other medicines that interact more seriously with vardenafil, such as nitrates (used for angina), alpha-blockers (used for prostate or blood pressure), or potent CYP3A4 inhibitors (certain antifungals, antibiotics, or HIV medicines) [5].

The prescriber may recommend starting on a lower dose of vardenafil if you are taking multiple medicines or have other risk factors. They will also advise you on how to take vardenafil safely, including avoiding grapefruit juice and limiting alcohol. If the prescriber has any concerns, they may ask for more information or suggest you see your GP for a face-to-face review before starting ED treatment.

At a glance

Practical Safety Advice When Taking Vardenafil and Pregabalin

If your prescriber approves vardenafil while you are taking pregabalin, there are some practical steps you can take to use both medicines safely. First, be aware that you may feel more dizzy or drowsy than usual, especially when you first start vardenafil or if your pregabalin dose has recently changed. Avoid standing up too quickly, particularly after sitting or lying down for a while, as this can make dizziness worse.

Limit alcohol when taking either medicine, as alcohol can increase dizziness, drowsiness, and the blood-pressure-lowering effect of vardenafil. Heavy drinking also makes erectile dysfunction worse and reduces the effectiveness of ED treatment [1]. If you do drink, keep it to a small amount and see how you feel before having more.

Take vardenafil about 25 to 60 minutes before you plan to have sex, on an empty stomach or after a light meal, as a heavy or high-fat meal can delay how quickly it works [5]. Continue taking pregabalin exactly as prescribed by your doctor—do not skip doses or change the timing to fit around vardenafil, as this can affect your nerve pain or anxiety control. If you experience unusual dizziness, fainting, or any other concerning symptoms, stop taking vardenafil and contact your GP or pharmacist for advice.

When to Seek Medical Advice

You should seek urgent medical help if you experience an erection lasting more than four hours (priapism), sudden loss of vision or hearing, or chest pain during or after sex. These are rare but serious side effects of vardenafil that need immediate attention [5]. If you feel severely dizzy, faint, or unwell after taking vardenafil and pregabalin together, sit or lie down and seek medical advice. Do not drive or operate machinery if you feel drowsy or unsteady.

Other Medicines That Interact With Vardenafil and Pregabalin

While vardenafil and pregabalin do not interact directly in a major way, both medicines can interact with other treatments you may be taking. Vardenafil must never be taken with nitrates (such as GTN spray, isosorbide mononitrate, or isosorbide dinitrate), nicorandil, riociguat, or recreational drugs called 'poppers' (amyl or alkyl nitrites). Combining vardenafil with any of these can cause a dangerous drop in blood pressure [5]. Do not take vardenafil if you are already using another PDE5 inhibitor such as sildenafil, tadalafil, or avanafil.

Alpha-blockers (such as doxazosin, tamsulosin, or alfuzosin) used for prostate problems or high blood pressure can also lower blood pressure when combined with vardenafil, increasing the risk of dizziness or fainting [5]. If you take an alpha-blocker, your prescriber will usually recommend starting on the lowest dose of vardenafil and ensuring you are stable on the alpha-blocker first. Potent CYP3A4 inhibitors, including some antifungals (ketoconazole, itraconazole), antibiotics (clarithromycin), and HIV medicines (ritonavir, cobicistat), can raise vardenafil levels in the blood; vardenafil is often contraindicated or requires dose adjustment with these medicines [5].

Pregabalin can add to the sedative effects of other medicines that cause drowsiness, such as opioid painkillers, benzodiazepines, antidepressants, antihistamines, and alcohol. Always tell your prescriber and pharmacist about every medicine you take, including over-the-counter products, herbal remedies, and supplements, so they can check for interactions and advise you safely.

Medicines You Must Avoid With Vardenafil

Do not take vardenafil together with nitrates (GTN spray, isosorbide mononitrate, isosorbide dinitrate), nicorandil, riociguat, poppers (amyl/alkyl nitrites), or another PDE5 inhibitor (sildenafil, tadalafil, avanafil). These combinations can cause a severe and potentially life-threatening drop in blood pressure [5]. If you are unsure whether any of your medicines fall into these categories, check with your GP or pharmacist before requesting vardenafil.

In summary

• No major direct interaction is commonly reported between vardenafil and pregabalin.
• Both medicines can cause dizziness; be cautious when standing and limit alcohol.
• Always declare pregabalin during your online consultation so the prescriber can check your suitability.
• Never take vardenafil with nitrates, nicorandil, riociguat, poppers, or another PDE5 inhibitor.
• Seek urgent help for an erection lasting over four hours or sudden vision or hearing loss.

Frequently Asked Questions