Can Antifungal Medicines Cause Low Mood or Depression?

Older woman sitting thoughtfully beside a window, illustrating the emotional impact of antifungal treatment and living with aspergillosis. — Low mood can have several causes during antifungal treatment, including possible medication side effects, fatigue, poor sleep and the emotional demands of living with aspergillosis.

Understanding low mood, depression and emotional wellbeing during aspergillosis treatment

Living with aspergillosis can affect much more than your lungs. Fatigue, breathlessness, disrupted sleep, uncertainty and long courses of treatment can all influence how you feel emotionally.

But could antifungal medicines themselves contribute to low mood?

This question was raised by a patient taking posaconazole. It is an important question because emotional changes may not always be recognised as possible treatment-related problems.

Can posaconazole cause depression?

Yes, depression is listed as a rare possible adverse reaction to posaconazole. In UK prescribing information, rare generally means reported in between 1 in 1,000 and 1 in 10,000 people.

Sleep disorders, abnormal dreams and confusion are listed as uncommon adverse reactions.

This does not mean that everyone experiencing low mood while taking posaconazole is having a drug reaction. The underlying illness, other medicines and personal circumstances may also contribute.

However, a noticeable change in mood after starting treatment deserves attention.

What about other antifungal medicines?

Different antifungals have different adverse-effect profiles.

Voriconazole has a more clearly recognised range of neuropsychiatric effects. Its UK prescribing information lists depression, anxiety, insomnia, agitation, confusion and hallucinations as common adverse reactions.

Other antifungals may affect wellbeing indirectly through nausea, fatigue, poor appetite, sleep disturbance or the practical demands of treatment.

The important point is that a medicine can be effective against Aspergillus while still causing difficulties for the person taking it.

Why else might aspergillosis affect mood?

There may be several overlapping explanations.

Living with chronic illness: Persistent symptoms, uncertainty about the future, reduced independence and changes to work or family life can be emotionally demanding.

Fatigue and poor sleep: Exhaustion can make ordinary problems harder to manage and reduce opportunities for enjoyable activities.

Other medicines: Corticosteroids can affect sleep, anxiety and mood. Some medicines may also interact with antifungals.

Physical health changes: Pain, poor nutrition and other medical problems can influence emotional wellbeing. Occasionally, antifungal-related changes in electrolytes or hormone regulation may require investigation.

Social isolation: Breathlessness, fatigue and infection concerns may make it harder to maintain relationships and activities.

Often there is no single explanation.

Recognising when your mood has changed

Changes are not always obvious. You might notice:

Feeling sad, anxious, unusually irritable or emotionally flat.
Losing interest in activities you previously enjoyed.
Difficulty concentrating or making decisions.
Sleeping much more or less than usual.
Withdrawing from friends or family.
Feeling overwhelmed by everyday tasks.

Someone close to you may notice changes before you do.

It can help to think about when symptoms began. Did they appear after starting an antifungal, increasing the dose or adding another medicine?

Keeping a brief record may help your clinician assess whether treatment could be contributing.

What can help when your mood is low?

There is no single solution, particularly when you are also coping with a chronic respiratory condition. Small, achievable changes are often more realistic than ambitious plans.

Keep some connection with other people

A conversation with a friend, family member or patient support group can reduce isolation. You do not always need to discuss your illness; ordinary social contact matters too.

Find activities that feel worthwhile

Reading, gardening, music, hobbies, creative activities or spending time outdoors can provide enjoyment and a sense of purpose.

When energy is limited, even a few minutes may be worthwhile.

Move within your limits

Gentle physical activity may support mood and sleep, but breathlessness and fatigue must be respected. Follow any advice from your clinical team about safe activity and oxygen requirements.

Protect your sleep

Regular sleep and waking times, a comfortable sleeping environment and discussing symptoms that disturb sleep may help.

Pace yourself

Trying to do too much on a good day can sometimes lead to exhaustion afterwards. Planning manageable activities and rest periods may help preserve energy for things that matter.

Talk about how you feel

Sharing concerns with someone you trust can help. You do not need to wait until low mood becomes severe before seeking support.

These approaches may improve wellbeing, but they are not substitutes for assessment or treatment of depression.

When should you speak to your clinical team?

Contact your GP or specialist team if:

Your mood changes noticeably after starting or changing medication.
Low mood persists for two weeks or more.
Anxiety, sleep problems or irritability interfere with daily life.
You experience confusion, hallucinations or unusual changes in behaviour.
You are finding it increasingly difficult to cope.

Your team may review medication doses, drug interactions, blood results, sleep and other possible causes.

Sometimes changing treatment may be appropriate, but this decision needs to balance the benefits of controlling aspergillosis against possible adverse effects.

Do not stop or change antifungal medication without discussing it with your clinical team.

If you have thoughts of harming yourself or feel unable to stay safe, seek urgent help. Call 999 if there is immediate danger, or contact NHS 111 for urgent mental health support.

Psychological support is part of healthcare

Depression and anxiety are treatable. Support may include talking therapies, practical help, medication where appropriate, or a combination of approaches.

In England, adults can often refer themselves to NHS Talking Therapies without first seeing a GP.

If antidepressant medication is considered, the prescriber or pharmacist should check for interactions with antifungal treatment.

A question worth asking at your next appointment

“Could my treatment, or something associated with my illness, be contributing to how I feel emotionally?”

This is as reasonable a question as asking about nausea, liver function or any other treatment-related problem.

Managing aspergillosis is not only about controlling fungal disease. It is also about helping people maintain their wellbeing, independence and quality of life.