Vardenafil and Sertraline: Can You Take Them Together?

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What Is Vardenafil?

Vardenafil is a prescription medicine used to treat erectile dysfunction (ED) in adult men. It belongs to a group of medicines called PDE5 inhibitors, which work by relaxing blood vessels in the penis, allowing increased blood flow when you are sexually aroused [5]. Vardenafil is the generic version of the branded medicine Levitra.

The medicine is available in 5mg, 10mg, and 20mg tablets. You typically take vardenafil about 25 to 60 minutes before sexual activity, and it works only when you are sexually stimulated [5]. The effect can last for several hours, but you should not take it more than once a day. Vardenafil does not cure ED or increase sexual desire; it helps you achieve and maintain an erection sufficient for sexual activity when arousal occurs.

Common side effects include headache, flushing, nasal congestion, and indigestion. Vardenafil is not suitable for everyone—particularly men taking nitrates, nicorandil, riociguat, or those for whom sexual activity is inadvisable due to heart problems [5]. A UK prescriber will assess your suitability during an online consultation before any prescription is issued.

What Is Sertraline?

Sertraline is a prescription antidepressant that belongs to a class of medicines called selective serotonin reuptake inhibitors (SSRIs). It is commonly prescribed for depression, anxiety disorders, obsessive-compulsive disorder (OCD), post-traumatic stress disorder (PTSD), and panic disorder. Sertraline works by increasing levels of serotonin—a chemical messenger in the brain that helps regulate mood.

The medicine is usually taken once daily, either in the morning or evening, and it can take several weeks to feel the full benefit. Common side effects include nausea, dizziness, dry mouth, sleep disturbances, and sexual side effects such as reduced libido or difficulty reaching orgasm. Interestingly, sexual side effects are a well-recognised issue with SSRIs, and some men taking sertraline may experience erectile difficulties as a result of the medication itself.

If you are prescribed sertraline, it is important to take it regularly as directed and not to stop suddenly without medical advice, as this can cause withdrawal symptoms. Your GP or psychiatrist will monitor your response to treatment and adjust the dose if needed. When starting treatment for ED, always inform your prescriber that you are taking sertraline so they can check for any interactions or contraindications.

Can Sertraline Cause Erectile Dysfunction?

Yes, sertraline and other SSRIs are known to cause sexual side effects in some men, including reduced libido, delayed ejaculation, and erectile dysfunction [1]. These effects occur because serotonin can influence sexual function, and increasing serotonin levels may dampen sexual arousal and response. Not every man will experience these side effects, and the severity varies.

If you believe sertraline is contributing to ED, do not stop taking it without speaking to your doctor. There may be alternative antidepressants with a lower risk of sexual side effects, or your doctor may adjust your dose. In some cases, treating the ED with a PDE5 inhibitor like vardenafil can be an effective solution, allowing you to continue your mental health treatment while also addressing erectile difficulties.

When to get urgent help

• Erection lasting more than 4 hours (priapism)—go to A&E immediately
• Sudden loss of vision or hearing—seek urgent medical help
• Chest pain during or after sex—call 999
• Severe dizziness, fainting, or signs of very low blood pressure—seek same-day medical advice

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

Vardenafil and Sertraline: Is There an Interaction?

There is no major drug interaction between vardenafil and sertraline, and the two medicines can generally be taken together safely. Neither medicine significantly affects the way the other is processed by the body, and they do not share a dangerous contraindication. Many men are prescribed both medicines concurrently—sertraline for mental health and vardenafil to manage ED, which may itself be a side effect of the antidepressant.

However, both medicines can cause a small reduction in blood pressure. When taken together, there is a theoretical risk of additive blood-pressure-lowering effects, which might lead to dizziness or light-headedness, particularly when standing up quickly. This is usually mild and manageable, but it is important that your prescriber knows you are taking sertraline so they can assess your overall cardiovascular health and choose an appropriate starting dose of vardenafil [5].

During your online consultation at Cured Pharmacy, you will be asked to list all current medicines, including sertraline. A UK-registered prescriber will review your answers to ensure vardenafil is safe and suitable for you. If you experience any unusual symptoms—such as severe dizziness, fainting, or chest pain—seek medical advice promptly. Never take vardenafil if you are also using nitrates, nicorandil, riociguat, or recreational drugs known as 'poppers', as these combinations can cause a dangerous drop in blood pressure [5].

What Your Prescriber Will Check

Before prescribing vardenafil, your clinician will review your full medical history, current medications, and any underlying health conditions. They will specifically check whether you are taking any medicines that interact dangerously with PDE5 inhibitors, such as nitrates (GTN spray, isosorbide mononitrate or dinitrate), nicorandil, riociguat, or another PDE5 inhibitor [5]. These combinations are contraindicated because they can cause a severe and potentially life-threatening fall in blood pressure.

Your prescriber will also ask about alpha-blockers (such as tamsulosin or doxazosin, often used for prostate symptoms), as these can interact with vardenafil and increase the risk of dizziness or fainting. If you take an alpha-blocker, you may be started on a lower dose of vardenafil, and your prescriber will ensure you are stable on the alpha-blocker before adding ED treatment [5].

Other important checks include your cardiovascular health—whether you have had a recent heart attack or stroke, unstable angina, severe heart failure, or very low blood pressure—as vardenafil may not be suitable if sexual activity itself is inadvisable [5]. The prescriber will also ask about any history of sudden vision loss (a rare condition called non-arteritic anterior ischaemic optic neuropathy, or NAION) or inherited retinal disorders. Declaring all your current medicines, including sertraline, ensures the prescriber can make a safe, informed decision tailored to your individual circumstances.

Potent CYP3A4 Inhibitors and Vardenafil

Vardenafil is broken down in the liver by an enzyme called CYP3A4. Medicines that strongly inhibit this enzyme—such as ritonavir, cobicistat (found in some HIV treatments), ketoconazole, itraconazole, and clarithromycin—can significantly increase vardenafil levels in the blood, raising the risk of side effects [5]. In many cases, vardenafil is contraindicated or requires a substantial dose reduction when used with potent CYP3A4 inhibitors.

If you are taking any of these medicines, your prescriber will check the Summary of Product Characteristics (SmPC) and may recommend an alternative ED treatment or adjust the dose accordingly. Always declare every medicine you take, including those prescribed by different doctors, over-the-counter products, and herbal supplements such as St John's wort, which can reduce the effectiveness of vardenafil [5].

At a glance

Practical Advice for Taking Vardenafil and Sertraline Together

If you are prescribed both vardenafil and sertraline, take each medicine exactly as directed. Sertraline is usually taken once daily at the same time each day, while vardenafil is taken on demand, about 25 to 60 minutes before you plan to have sex [5]. You do not need to time the two medicines in any special way—just follow the instructions for each.

Be aware that both medicines can cause dizziness, particularly when you first start treatment or if your dose is increased. To minimise this risk, avoid standing up too quickly from sitting or lying down, and be cautious if you drink alcohol, as this can add to the blood-pressure-lowering effect and may also worsen erectile difficulties [1][5]. Grapefruit juice can increase vardenafil levels and should be avoided.

Vardenafil works only when you are sexually aroused, so it will not cause an automatic erection. If you find that vardenafil is not effective, do not increase the dose yourself—speak to your prescriber, who may adjust the dose or suggest an alternative PDE5 inhibitor such as sildenafil or tadalafil. If you experience an erection lasting more than four hours (priapism), sudden loss of vision or hearing, or chest pain during sex, seek urgent medical help immediately [5]. Continue taking sertraline as prescribed and do not stop it suddenly without medical advice, even if your mood improves or you experience side effects.

Other ED Treatments and Sertraline

If vardenafil is not suitable or effective for you, there are other licensed ED treatments available in the UK. Sildenafil (generic Viagra) is taken about one hour before sex and lasts for around four to six hours [3]. Tadalafil (generic Cialis) can be taken on demand (at least 30 minutes before sex, with effects lasting up to 36 hours) or as a lower daily dose [4]. Avanafil (Spedra) has a faster onset, working in as little as 15 to 30 minutes [6]. All of these are PDE5 inhibitors and share similar interactions and precautions with sertraline.

There is no major interaction between sertraline and any of the PDE5 inhibitors, so your prescriber can help you choose the one that best fits your lifestyle and preferences. Some men prefer the longer duration of tadalafil, while others like the faster action of avanafil or the familiarity of sildenafil. All require sexual stimulation to work and are taken on demand, except for the daily low-dose tadalafil option [3][4][6].

For men who cannot take PDE5 inhibitors—for example, those using nitrates for angina—alternative treatments include alprostadil cream (Vitaros) or alprostadil injections (Caverject), both of which are prescription-only [7]. Eroxon is a topical gel medical device available without prescription. Your GP or a specialist can discuss these options if oral treatments are not suitable. At Cured Pharmacy, all prescription ED medicines are supplied only after an online consultation reviewed by a UK-registered prescriber, ensuring safety and suitability for your individual circumstances.

When to See Your GP

If you are experiencing erectile dysfunction for the first time, it is important to see your GP for a face-to-face assessment. ED can be an early warning sign of underlying health conditions such as heart disease, diabetes, or high blood pressure [1][2]. Your GP can arrange blood tests, check your cardiovascular health, and review your current medicines to identify any contributing factors.

If you believe sertraline is causing or worsening your ED, discuss this with the doctor who prescribed it. They may adjust your dose, switch you to a different antidepressant with fewer sexual side effects, or refer you for specialist advice. Do not stop taking sertraline suddenly, as this can cause withdrawal symptoms and a return of your mental health symptoms. Treating ED with vardenafil or another PDE5 inhibitor can be an effective solution, but it is important to address both your mental and sexual health in partnership with your healthcare team.

In summary

• Vardenafil and sertraline can usually be taken together safely with no major interaction.
• Both medicines may lower blood pressure slightly; report dizziness or fainting to your doctor.
• Sertraline can sometimes cause ED; vardenafil may help manage this side effect.
• Always declare all current medicines during your consultation for a full safety check.
• Never take vardenafil with nitrates, nicorandil, riociguat, or poppers—this is dangerous.

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