Generic Name: flibanserin (flib-AN-ser-in)
The use of flibanserin and alcohol together close in time increases the risk of severe hypotension and syncope. Counsel patients to wait at least 2 hours after consuming 1 or 2 standard alcoholic drinks before taking flibanserin at bedtime or to skip their bedtime flibanserin dose if they have consumed 3 or more standard alcoholic drinks that evening. Flibanserin is contraindicated with moderate or strong CYP3A4 inhibitors and in patients with hepatic impairment due to risk of severe hypotension and syncope .
Medically reviewed by Drugs.com. Last updated on Feb 25, 2021.
Commonly used brand name(s)
In the U.S.
Available Dosage Forms:
Therapeutic Class: Central Nervous System Agent
Uses for flibanserin
Flibanserin is used to treat hypoactive sexual desire disorder (HSDD) in women who have not gone through menopause. Flibanserin should only be used by women who have low sexual desire that is troubling to them and is caused by a medical or mental problem, problems in the relationship, or medicine or other drug use.
Women who have gone through menopause and men should not use flibanserin. Do not use flibanserin to improve sexual performance.
Flibanserin is available only with your doctor's prescription.
Before using flibanserin
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For flibanserin, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to flibanserin or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Flibanserin should never be used in children for HSDD.
Flibanserin is not recommended for use in the elderly. Safety and efficacy have not been established.
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Interactions with medicines
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking flibanserin, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using flibanserin with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.
Using flibanserin with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Calcium Oxybate
- Chloral Hydrate
- Dabigatran Etexilate
- Gabapentin Enacarbil
- Magnesium Oxybate
- Methylene Blue
- Morphine Sulfate Liposome
- Nitrous Oxide
- Opium Alkaloids
- Potassium Oxybate
- Sodium Oxybate
- Tolonium Chloride
- Vincristine Sulfate Liposome
Using flibanserin with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Interactions with food/tobacco/alcohol
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using flibanserin with any of the following is not recommended. Your doctor may decide not to treat you with this medication, change some of the other medicines you take, or give you special instructions about the use of food, alcohol, or tobacco.
- Grapefruit Juice
Using flibanserin with any of the following is usually not recommended, but may be unavoidable in some cases. If used together, your doctor may change the dose or how often you use flibanserin, or give you special instructions about the use of food, alcohol, or tobacco.
Other medical problems
The presence of other medical problems may affect the use of flibanserin. Make sure you tell your doctor if you have any other medical problems, especially:
- Depression or mental illness, history of or
- Drug or alcohol abuse, or history of or
- Hypotension (low blood pressure)—Use with caution. May make these conditions worse.
- Liver problem—Should not be used in patients with this condition.
Proper use of flibanserin
Take flibanserin exactly as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered.
The medicine should come with a Medication Guide. Read and follow these instructions carefully. Ask your doctor or pharmacist if you have any questions.
Take flibanserin only at bedtime. Taking flibanserin at a time other than bedtime may increase risk of low blood pressure, fainting, accidental injury, or sleepiness.
Do not eat grapefruit or drink grapefruit juice while you are using flibanserin. Grapefruit and grapefruit juice may change the amount of flibanserin that is absorbed in the body.
The dose of flibanserin will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of flibanserin. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
- For oral dosage form (tablets):
- For treatment of hypoactive sexual desire disorder:
- Adults—100 milligrams (mg) once a day at bedtime.
- Children—Use is not recommended.
- For treatment of hypoactive sexual desire disorder:
If you miss a dose of flibanserin, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
Precautions while using flibanserin
It is very important that your doctor check your progress at regular visits to make sure that flibanserin is working properly and to check for unwanted effects.
Do not use flibanserin together with the following: amprenavir, atazanavir (Reyataz®), boceprevir (Victrelis®), ciprofloxacin (Cipro®), clarithromycin (Biaxin®), conivaptan (Vaprisol®), diltiazem (Cardizem®), erythromycin (Ery-Tab®), fluconazole (Diflucan®), fosamprenavir (Lexiva®), indinavir (Crixivan®), itraconazole (Sporanox®), ketoconazole (Nizoral®), nefazodone, nelfinavir (Viracept®), posaconazole (Noxafil®), ritonavir (Norvir®), saquinavir (Invirase®), telaprevir, telithromycin (Ketek®), or verapamil (Calan®). Using these medicines together may increase risk for low blood pressure and fainting.
Lightheadedness, dizziness, or fainting may occur when you take flibanserin within 2 hours of drinking alcohol. It is recommended to wait at least 2 hours after drinking 1 or 2 standard alcoholic drinks (eg, one 12-ounce regular beer, 5 ounces of wine, or 1.5 ounces of distilled spirits or shot) before taking flibanserin at bedtime, or you may skip your dose if you drink 3 or more standard alcoholic drinks in the evening. If you have taken flibanserin at bedtime, do not drink alcohol until the following day.
Flibanserin will add to the effects of alcohol and other CNS depressants (medicines that may make you drowsy or less alert). Some examples of CNS depressants are antihistamines or medicines for hay fever, allergies, or colds, sedatives, tranquilizers, or sleeping medicine, prescription pain medicine or narcotics, medicine for seizures or barbiturates, muscle relaxants, or anesthetics, including some dental anesthetics. Check with your doctor before taking any of these medicines while you are using flibanserin.
If your condition does not improve within 8 weeks, or if it become worse, check with your doctor.
Flibanserin may cause you to feel dizzy, drowsy, or lightheaded. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert for at least 6 hours after you take flibanserin and until you know how flibanserin affects you. If you feel lightheaded, getting up slowing after sitting or lying down may help.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal (eg, St. John's wort) or vitamin supplements.
Flibanserin side effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
- Blurred vision
- dizziness, fainting, or lightheadedness, especially when getting up suddenly from a lying or sitting position
- sleepiness or unusual drowsiness
- unusual tiredness or weakness
- Feeling of constant movement of self or surroundings
- sensation of spinning
- severe cramping
- stomach or lower abdominal pain
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
- dry mouth
- normal menstrual bleeding occurring earlier, possibly lasting longer than expected
- trouble sleeping
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
Frequently asked questions
More about flibanserin
- Side Effects
- During Pregnancy
- Dosage Information
- Drug Interactions
- En Español
- 44 Reviews
- Drug class: miscellaneous central nervous system agents
- Other brands
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