Lithium Erectile Dysfunction: Causes & Treatment

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Key takeaways

• Lithium can cause erectile dysfunction in some men, though it is less common than with many antidepressants
• Never stop or reduce lithium without medical advice, as this can cause serious relapse of mood symptoms
• ED tablets such as sildenafil and tadalafil can usually be used safely alongside lithium after a consultation
• Discuss erection problems with your prescriber to explore dose adjustments, thyroid checks, or ED treatment options

Does lithium cause erectile dysfunction?

Yes, lithium can cause erectile dysfunction in some men, though it is not one of the most commonly reported side effects. Sexual dysfunction, including reduced libido and difficulty achieving or maintaining erections, has been documented in men taking lithium, but the exact frequency is not well established in large-scale studies [2]. The mechanism is not fully understood, but lithium may affect sexual function through its effects on neurotransmitters, hormones, or blood flow.

It's worth noting that the condition lithium treats—bipolar disorder—can itself affect sexual function during depressive or manic episodes. Stress, anxiety, and the psychological burden of managing a chronic mental health condition can all contribute to erection problems independently of medication [1]. This makes it important to consider the whole picture when assessing whether lithium is the cause of your symptoms.

If you've noticed changes in your sexual function since starting lithium, or if erection problems have worsened, it's essential to discuss this with your prescriber. They can help determine whether lithium is the likely cause and explore options to address the issue without compromising your mental health treatment.

How common is lithium erectile dysfunction?

The exact prevalence of erectile dysfunction caused by lithium is difficult to pinpoint because sexual side effects are often underreported in clinical trials and routine practice. Men may feel uncomfortable discussing these issues, and healthcare professionals may not always ask about sexual function during consultations. However, lithium is generally considered to have a lower risk of sexual side effects compared to many antidepressants, particularly selective serotonin reuptake inhibitors (SSRIs) [2].

When sexual dysfunction does occur with lithium, it may manifest as reduced libido, difficulty achieving an erection, or problems maintaining firmness during sex. These effects can develop at any point during treatment, though they are sometimes noticed when the dose is increased or when lithium is combined with other medications that also affect sexual function.

Individual responses to lithium vary widely. Some men take lithium for years without any sexual side effects, while others may notice changes relatively quickly. Factors such as age, overall health, the presence of other medical conditions (such as diabetes or cardiovascular disease), and the use of other medications can all influence the likelihood and severity of erectile dysfunction [1][2].

At a glance

What you should NOT do if you experience lithium erectile dysfunction

Never stop taking lithium or reduce your dose without first consulting your prescriber. Lithium is a critical medication for managing bipolar disorder and other mood conditions, and stopping it abruptly can lead to a relapse of symptoms, including severe mood swings, mania, or depression. The risks of untreated bipolar disorder are significant and can affect every aspect of your life, including relationships, work, and overall wellbeing [2].

Do not attempt to self-medicate with over-the-counter supplements, herbal remedies, or erectile dysfunction treatments purchased without a proper consultation. Some products sold online may not be genuine, may contain unlisted ingredients, or may interact dangerously with lithium or other medications you are taking. Always obtain ED treatments through a regulated pharmacy after a clinical assessment by a UK-registered prescriber.

Avoid making assumptions about the cause of your erection problems without professional input. Erectile dysfunction can have multiple causes, including cardiovascular disease, diabetes, hormonal imbalances, stress, anxiety, and relationship issues [1]. A thorough assessment by your GP or prescriber is essential to identify the underlying cause and ensure you receive the most appropriate treatment.

Why continuing lithium is important

Lithium is one of the most effective mood stabilisers available and has been used for decades to prevent manic and depressive episodes in people with bipolar disorder. Stopping lithium without medical supervision can lead to a rapid return of symptoms, which may be more difficult to control than before. Your prescriber can work with you to find a solution that protects both your mental health and your sexual wellbeing.

Options to discuss with your prescriber about lithium and erection problems

If you're experiencing erectile dysfunction while taking lithium, there are several approaches your prescriber may consider. The first step is a thorough review of your overall health, including blood tests to check lithium levels, thyroid function, and other factors that can affect sexual function. Lithium can sometimes affect the thyroid gland, and thyroid problems can themselves cause erectile dysfunction, so this is an important area to investigate [2].

Your prescriber may also review all your current medications to identify any other contributors to erectile dysfunction. If you are taking additional medicines—such as antidepressants, blood pressure tablets, or other mood stabilisers—these may be adding to the problem. In some cases, adjusting the dose of lithium or switching to a different mood stabiliser may be considered, though this decision must be made carefully to avoid destabilising your mental health.

Another option is to treat the erectile dysfunction directly with a PDE5 inhibitor such as sildenafil or tadalafil, which can often be used safely alongside lithium. Your prescriber will assess whether this is appropriate for you based on your overall health, other medications, and any cardiovascular risk factors. Many men find that treating the ED allows them to continue their essential mental health medication without compromising their quality of life.

Lifestyle factors that can help

Addressing lifestyle factors can also make a difference. Regular exercise, a healthy diet, maintaining a healthy weight, reducing alcohol intake, stopping smoking, and managing stress can all improve erectile function [1]. These changes support both your mental and physical health and may reduce the impact of lithium on sexual function.

Can you use erectile dysfunction tablets with lithium?

In most cases, PDE5 inhibitor tablets such as sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Spedra) can be used safely alongside lithium. There is no major direct interaction between lithium and these erectile dysfunction treatments, and they work through different mechanisms in the body [3][4][5][6]. However, a full clinical assessment is always required before starting any ED treatment to ensure it is safe for you.

Your prescriber or pharmacist will check your full medical history and current medications during the consultation. PDE5 inhibitors must not be used if you are taking nitrates (such as GTN spray or isosorbide mononitrate), nicorandil, riociguat, or recreational drugs known as 'poppers', as the combination can cause a dangerous drop in blood pressure [3][4]. If you take alpha-blockers for prostate symptoms or blood pressure, you may need to start on a lower dose of the ED tablet and be monitored for dizziness.

If you have cardiovascular disease, very low blood pressure, or a history of stroke or heart attack, your prescriber will assess whether sexual activity is safe for you and whether ED tablets are appropriate. Sildenafil, tadalafil, vardenafil, and avanafil all require sexual stimulation to work and do not cause spontaneous erections. They are taken before planned sexual activity, and the choice of treatment depends on your preferences, how quickly you want it to work, and how long you want the effect to last [3][4][5][6].

Treatment options for lithium erectile dysfunction at Cured Pharmacy

Cured Pharmacy is a GPhC-registered online pharmacy (GPhC 9012511) offering a range of licensed erectile dysfunction treatments following a confidential online consultation reviewed by a UK-registered prescriber. All treatments are dispensed by our qualified pharmacists and delivered discreetly to your door. If you are taking lithium and experiencing erection problems, our prescribers will review your full medical history and current medications to ensure any treatment is safe and appropriate for you.

We offer both generic and branded options, including sildenafil (generic Viagra), which is taken about one hour before sex and works for up to four hours; tadalafil (generic Cialis), which can be taken on-demand (working for up to 36 hours) or as a lower daily dose; vardenafil (generic Levitra), which works in 25–60 minutes; and avanafil (Spedra), which can work in as little as 15–30 minutes [3][4][5][6]. Your prescriber will help you choose the most suitable option based on your lifestyle and preferences.

Our consultation process is straightforward and confidential. You complete a short online questionnaire about your health, current medications (including lithium), and any other medical conditions. A UK prescriber reviews your answers and, if appropriate, approves your treatment. If ED tablets are not suitable for you, the prescriber will explain why and may suggest discussing alternative options with your GP. You should never purchase ED treatments without a proper consultation, as this can be unsafe.

Why see your GP about new erectile dysfunction

If you have not yet discussed your erection problems with a healthcare professional, it is important to see your GP. Erectile dysfunction can be an early warning sign of cardiovascular disease, diabetes, or other health conditions that need investigation and treatment [1][2]. Your GP can arrange tests, review your overall health, and work with your psychiatrist or mental health team to ensure your lithium treatment and sexual health are both managed effectively.

When to get urgent help

• An erection lasting more than 4 hours (priapism) after taking ED tablets—go to A&E immediately
• Sudden loss of vision or hearing after taking ED treatment—seek urgent medical help
• Chest pain during or after sex—stop activity and call 999 if pain does not resolve quickly
• Severe dizziness, fainting, or very low blood pressure after taking ED tablets—seek same-day medical advice
• New or worsening mood symptoms, suicidal thoughts, or severe confusion—contact your mental health team or GP urgently

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

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