What Is Fliban 100mg?

Fliban 100mg is a tablet containing the active ingredient flibanserin.

The Fliban 100 brand is associated with Centurion Laboratories and is marketed as a 100mg flibanserin tablet.

Flibanserin was originally investigated as an antidepressant, but researchers noticed that it influenced sexual desire in some women. It was subsequently developed specifically for hypoactive sexual desire disorder.

In the United States, flibanserin is licensed under the brand name Addyi. The current FDA-approved indication covers women under the age of 65 with acquired, generalized HSDD.

Fliban itself should not automatically be assumed to have the same regulatory status as Addyi. Brand, manufacturer and market authorisation still matter even when two products contain the same stated active ingredient.

What Is Flibanserin Used For?

Flibanserin is used to treat acquired, generalized hypoactive sexual desire disorder.

That definition is fairly specific, so it helps to break it down.

• Hypoactive sexual desire disorder: sexual desire is persistently reduced and the problem causes significant distress.
• Acquired: the woman previously had a level of sexual desire that she considered normal or satisfactory.
• Generalized: the low desire occurs across different situations, forms of sexual activity and partners rather than being limited to one particular circumstance.

Low sexual desire should also not be better explained by:

• Another medical condition
• A psychiatric or psychological condition
• Relationship difficulties
• The effects of another medicine
• Alcohol or recreational drugs

This distinction matters because libido naturally changes. Stress, exhaustion, pregnancy, relationship problems, hormonal changes, depression, certain medicines and plenty of ordinary life circumstances can all affect sexual desire without necessarily representing HSDD.

How Does Flibanserin Work?

The exact mechanism by which flibanserin improves HSDD is not completely understood.

What is known is that flibanserin acts on serotonin receptors in the brain. It has activity at 5-HT1A and 5-HT2A receptors and appears to influence several neurotransmitters associated with sexual interest and motivation, including serotonin, dopamine and norepinephrine.

This is fundamentally different from medicines such as sildenafil.

Sildenafil works mainly by influencing blood flow during sexual stimulation. Flibanserin acts within the central nervous system and is intended to influence sexual desire itself over time.

That is why flibanserin is taken every day rather than saved for the hour before sex.

Is Fliban 100mg “Female Viagra”?

Flibanserin is sometimes called the “female Viagra”, but the nickname creates more confusion than clarity.

Viagra and flibanserin address very different aspects of sexual function.

So while “female Viagra” is an easy headline, it is not a particularly accurate medical description of flibanserin.

How Do You Take Flibanserin 100mg?

The established flibanserin regimen is 100mg once daily at bedtime.

Bedtime dosing is important. Flibanserin can cause sleepiness, sedation, dizziness, low blood pressure and fainting. Taking it during waking hours increases the potential for these effects to cause injury.

General dosing guidance for flibanserin includes:

• Take one 100mg dose at bedtime when prescribed.
• Do not take more than one dose in a day.
• Do not take an extra tablet before sexual activity.
• If a dose is missed, skip it and take the next scheduled dose at bedtime the following day.
• Do not double the next dose to compensate for a missed tablet.

Flibanserin is not a medicine that should be taken only when sex is anticipated.

How Long Does Flibanserin Take to Work?

Flibanserin does not work in the same way as an on-demand sexual medicine.

The effect develops gradually with regular daily treatment. Some women may notice changes within several weeks, while others may take longer.

The established prescribing guidance uses eight weeks as an important checkpoint. If HSDD symptoms have not improved after eight weeks of treatment, continuing flibanserin is generally not recommended.

That is a very different timeline from sildenafil, where effectiveness can be judged after an individual dose.

With flibanserin, the useful questions are whether sexual desire has meaningfully improved and whether the distress associated with low desire has decreased over the course of treatment.

Does Flibanserin Make You Want Sex Immediately?

No.

Flibanserin does not normally create an immediate surge in sexual desire after taking a tablet.

It is intended to produce a gradual improvement in sexual desire in women with HSDD when taken consistently over time.

It is also not intended to create artificial sexual arousal on demand or to act as a general sexual performance enhancer.

If someone takes a 100mg flibanserin tablet shortly before sex expecting an effect similar to Viagra, they are using the wrong mental model for how the medicine works.

Does Flibanserin Increase Orgasms?

Flibanserin is not specifically an orgasm medicine.

Its intended target is low sexual desire associated with HSDD. Clinical studies of flibanserin have looked at changes in sexual desire, distress associated with low desire and satisfying sexual events.

A woman whose primary problem is difficulty reaching orgasm but who has otherwise normal sexual desire may therefore have a different sexual health issue requiring a different assessment.

This is another reason broad claims that flibanserin simply “improves female sexual performance” are misleading.

Who May Be Suitable for Flibanserin?

Flibanserin has been studied for women with acquired, generalized HSDD.

The current US-approved indication for flibanserin covers women younger than 65 whose low sexual desire:

• Developed after previously having satisfactory sexual desire
• Occurs generally rather than only in one situation
• Causes significant distress or interpersonal difficulty
• Is not explained by another medical or psychiatric condition
• Is not primarily caused by relationship problems
• Is not a side effect of another medicine or substance

Flibanserin is not indicated for men and is not intended simply to enhance sexual performance in people who do not have HSDD.

Can Postmenopausal Women Take Flibanserin?

This is an area where older information online can now be misleading.

Flibanserin was originally approved in the United States only for premenopausal women with acquired, generalized HSDD.

That changed in 2025. The FDA-approved indication for Addyi was expanded to include women under 65 regardless of reproductive status, meaning appropriately diagnosed postmenopausal women under 65 are now included in the US indication.

This does not mean every woman with reduced libido after menopause is automatically a candidate for flibanserin. Menopause can affect sexual function through vaginal dryness, pain, hormonal changes and other factors that may require different treatment.

A proper assessment remains important.

Fliban 100mg and Alcohol

This is one of the most important safety issues with flibanserin.

Alcohol taken close to a flibanserin dose can increase the risk of severe low blood pressure and fainting.

Current flibanserin prescribing guidance advises:

• If you drink one or two standard alcoholic drinks in the evening, wait at least two hours before taking flibanserin at bedtime.
• If you have three or more alcoholic drinks that evening, skip the flibanserin dose entirely.
• Once you have taken flibanserin at bedtime, do not drink alcohol again until the following day.

This is not a minor interaction tucked away in the small print. Severe hypotension and loss of consciousness are among the central safety concerns associated with flibanserin.

Can You Drink Grapefruit Juice With Flibanserin?

Grapefruit juice should be avoided with flibanserin.

Grapefruit can inhibit the CYP3A4 enzyme involved in metabolising flibanserin. This can raise flibanserin levels in the blood and increase the risk of side effects including low blood pressure and fainting.

This interaction is a good example of why giving a prescriber or pharmacist a complete list of medicines, supplements and dietary products matters with flibanserin.

What Are the Side Effects of Flibanserin 100mg?

Like any medicine acting on the central nervous system, flibanserin can cause unwanted effects.

Commonly reported side effects include:

• Dizziness
• Sleepiness or somnolence
• Nausea
• Fatigue
• Insomnia
• Dry mouth
• Constipation
• Anxiety

Many of the more common adverse effects occur during the early part of treatment.

Flibanserin can also cause central nervous system depression, meaning reduced alertness, sedation and sleepiness. These effects are one reason the medicine is taken at bedtime rather than during the day.

Serious Side Effects

Potentially serious effects include:

• Severe low blood pressure
• Fainting or loss of consciousness
• Severe dizziness or lightheadedness
• Severe allergic reactions

If significant dizziness or lightheadedness develops, lie down. Seek medical help if the symptoms do not resolve or if fainting occurs.

Can Flibanserin Make You Sleepy?

Yes. Sleepiness and sedation are well-recognised effects of flibanserin.

This is one of the main reasons the medicine is taken at bedtime.

People using flibanserin should avoid driving, operating machinery or doing anything that requires full alertness until at least six hours after taking a dose and until they know how the medicine affects them.

The sedating effect can become more significant when flibanserin is combined with alcohol, sedative medicines or drugs that increase the amount of flibanserin in the bloodstream.

Who Should Not Take Flibanserin?

Flibanserin is not suitable for everyone.

It should not be taken by people with liver impairment, because impaired liver function can substantially increase exposure to flibanserin and raise the risk of severe hypotension and fainting.

It is also contraindicated with moderate or strong inhibitors of an enzyme called CYP3A4.

Examples of medicines that may cause important interactions include certain:

• Antifungal medicines
• Antibiotics
• HIV treatments
• Heart medicines
• Hepatitis C medicines
• Antidepressants or other psychiatric medicines

Because the interaction list is long and sometimes rather unintuitive, flibanserin should be medically screened rather than self-selected purely because low libido is present.

Flibanserin Drug Interactions

Flibanserin is metabolised primarily through the CYP3A4 enzyme system. Medicines or substances that strongly inhibit this pathway can increase flibanserin concentrations and make adverse effects considerably more likely.

Moderate or strong CYP3A4 inhibitors are therefore contraindicated with flibanserin.

Examples can include:

• Ketoconazole
• Itraconazole
• Clarithromycin
• Erythromycin
• Fluconazole
• Ciprofloxacin
• Verapamil
• Diltiazem
• Some HIV antiviral medicines
• Grapefruit juice

Other medicines and supplements can also affect flibanserin or compound its sedating effects.

Always tell your healthcare professional about prescription medicines, over-the-counter products, vitamins and herbal supplements before starting flibanserin.

Flibanserin and Antidepressants

Low sexual desire can itself be associated with depression and anxiety, but certain antidepressants can also reduce libido or make orgasm more difficult.

This makes the relationship between antidepressants and HSDD particularly important.

If low sexual desire began after starting an antidepressant or another medicine, the problem may not meet the definition of HSDD for which flibanserin was developed.

Some antidepressants can also interact pharmacologically with flibanserin.

Do not stop an antidepressant abruptly or add flibanserin on your own. A doctor can assess whether the reduced libido is related to the existing treatment and whether adjusting that treatment makes more sense.

Flibanserin During Pregnancy and Breastfeeding

There are insufficient human data to establish whether flibanserin poses a pregnancy-related risk.

If you are pregnant, think you may be pregnant or are planning a pregnancy, discuss this with a healthcare professional before using flibanserin.

Flibanserin is also not recommended during breastfeeding. It is not known whether flibanserin is present in human breast milk, and there is concern about potentially serious adverse effects such as sedation in a breastfed infant.

What Happens If You Miss a Flibanserin Dose?

If you forget your bedtime dose, skip it.

Take the next scheduled dose at bedtime the following day.

Do not take flibanserin the following morning and do not double the next dose.

The medicine is designed for consistent once-daily use, not catch-up dosing.

What If Flibanserin Does Not Work?

Flibanserin needs a fair trial because its effect develops over time, but treatment should not continue indefinitely when nothing is changing.

Established prescribing guidance recommends reassessing treatment after eight weeks.

If sexual desire or HSDD-related distress has not meaningfully improved by then, treatment should generally be discontinued and the situation reassessed.

Possible reasons for persistent low libido include:

• Depression or anxiety
• Relationship difficulties
• Stress and exhaustion
• Hormonal changes
• Pain during sex
• Vaginal dryness
• Menopausal symptoms
• Medication side effects
• Thyroid or other medical conditions

Low desire has a long list of possible causes. Sometimes the most useful treatment begins with discovering which one is actually present.

Is Flibanserin a Hormone?

No. Flibanserin is a non-hormonal medicine.

It does not contain oestrogen, progesterone or testosterone.

Instead, it acts on neurotransmitter systems in the brain that are thought to play a role in sexual desire.

This makes it fundamentally different from hormonal treatments that may sometimes be considered for sexual symptoms associated with menopause.

Flibanserin vs Sildenafil for Women

Flibanserin and sildenafil sometimes appear beside one another on websites selling female sexual health products, but they are not interchangeable.

Flibanserin is intended to address sexual desire in appropriately diagnosed women with HSDD.

Sildenafil primarily affects blood flow. It does not treat low desire itself.

A woman experiencing low libido therefore should not assume that a medicine designed around genital blood flow solves the same problem as a medicine acting on sexual desire pathways in the brain.

The symptom being treated matters more than whether both products happen to appear in the same “female enhancement” category online.

Can You Buy Fliban 100mg in the UK?

Fliban 100mg can be found on websites that sell or ship medicines internationally. That does not automatically mean the particular product has been authorised for routine supply in the UK.

Flibanserin is a medicine with significant contraindications and interactions, including the potential for severe low blood pressure, fainting and central nervous system depression.

Anyone in the UK considering treatment for persistently low sexual desire should therefore use an appropriately regulated healthcare provider or registered pharmacy rather than treating Fliban as an ordinary libido supplement.

A proper consultation also helps establish whether the symptoms actually fit HSDD or whether another medical, hormonal, psychological, relationship or medication-related issue is responsible.

Buying Flibanserin Online: What to Check

Low libido is personal, so the appeal of discreet online treatment is understandable. The medical assessment should not disappear simply because the consultation happens through a screen.

A responsible service should ask about:

• Your age
• How long the loss of sexual desire has been present
• Whether the problem is causing significant distress
• Medical and mental health conditions
• Relationship factors
• Current prescription medicines
• Alcohol use
• Liver problems
• Pregnancy and breastfeeding where relevant

Those questions are not bureaucratic decoration. They help determine whether flibanserin is appropriate and whether an interaction could make treatment unsafe.