Skip to main content

Saquinavir (Oral route)

Pronunciation:

sa-KWIN-a-vir

Brand Names:

  • Invirase

Dosage Forms:

  • Capsule, Liquid Filled
  • Tablet
  • Capsule

Classifications:

Therapeutic—

Antiretroviral Agent

Pharmacologic—

Protease Inhibitor

Uses of This Medicine:

Saquinavir is used in combination with ritonavir (Norvir®) and other medicines for the treatment of the infection caused by the human immunodeficiency virus (HIV). HIV is the virus that causes acquired immune deficiency syndrome (AIDS).

Saquinavir will not cure or prevent HIV infection or AIDS. It helps keep HIV from reproducing and appears to slow down the destruction of the immune system. This may help delay the development of problems usually related to AIDS or HIV disease from occurring. Saquinavir will not keep you from spreading HIV to other people. People who receive this medicine may continue to have other problems usually related to AIDS or HIV disease.

This medicine is available only with your doctor's prescription.

Before Using This Medicine:

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 this medicine, the following should be considered:

Allergies—

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine 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.

Children—

Appropriate studies have not been performed on the relationship of age to the effects of saquinavir in children younger than 16 years of age. Safety and efficacy have not been established.

Older adults—

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of saquinavir in the elderly. However, elderly patients are more likely to have age-related liver, kidney, or heart problems, which may require caution in patients receiving saquinavir.

Pregnancy—

Pregnancy CategoryExplanation
All TrimestersBAnimal studies have revealed no evidence of harm to the fetus, however, there are no adequate studies in pregnant women OR animal studies have shown an adverse effect, but adequate studies in pregnant women have failed to demonstrate a risk to the fetus.

Breast-feeding—

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.

Other 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 this medicine, 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 this medicine 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.

  • Alfuzosin
  • Amifampridine
  • Amiodarone
  • Aripiprazole
  • Artemether
  • Astemizole
  • Bepridil
  • Buserelin
  • Cisapride
  • Clarithromycin
  • Clozapine
  • Colchicine
  • Conivaptan
  • Crizotinib
  • Dabrafenib
  • Dasatinib
  • Delamanid
  • Deslorelin
  • Dihydroergotamine
  • Dofetilide
  • Domperidone
  • Doxorubicin
  • Doxorubicin Hydrochloride Liposome
  • Dronedarone
  • Eletriptan
  • Ergoloid Mesylates
  • Ergonovine
  • Ergotamine
  • Escitalopram
  • Eszopiclone
  • Everolimus
  • Fentanyl
  • Flecainide
  • Fluconazole
  • Fluoxetine
  • Gonadorelin
  • Goserelin
  • Histrelin
  • Ibrutinib
  • Ivabradine
  • Ketoconazole
  • Lapatinib
  • Leuprolide
  • Lidocaine
  • Lomitapide
  • Lovastatin
  • Lumefantrine
  • Lurasidone
  • Maraviroc
  • Mesoridazine
  • Methylergonovine
  • Metronidazole
  • Midazolam
  • Mifepristone
  • Nafarelin
  • Nilotinib
  • Nimodipine
  • Ondansetron
  • Pimozide
  • Piperaquine
  • Posaconazole
  • Propafenone
  • Quetiapine
  • Quinidine
  • Ranolazine
  • Rifampin
  • Riociguat
  • Romidepsin
  • Sevoflurane
  • Sildenafil
  • Silodosin
  • Simvastatin
  • Sorafenib
  • Sparfloxacin
  • Suvorexant
  • Telithromycin
  • Terfenadine
  • Thioridazine
  • Tizanidine
  • Tolvaptan
  • Trabectedin
  • Trazodone
  • Triazolam
  • Triptorelin
  • Vandetanib
  • Vemurafenib
  • Vilanterol
  • Vilazodone
  • Vinflunine
  • Vorapaxar
  • Ziprasidone

Using this medicine 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.

  • Ado-Trastuzumab Emtansine
  • Afatinib
  • Amitriptyline
  • Amoxapine
  • Amprenavir
  • Apomorphine
  • Arsenic Trioxide
  • Artemether
  • Asenapine
  • Atazanavir
  • Atorvastatin
  • Avanafil
  • Axitinib
  • Azithromycin
  • Bedaquiline
  • Boceprevir
  • Bosentan
  • Bosutinib
  • Brentuximab Vedotin
  • Cabazitaxel
  • Cabozantinib
  • Carbamazepine
  • Ceritinib
  • Chloroquine
  • Chlorpromazine
  • Ciprofloxacin
  • Citalopram
  • Clomipramine
  • Cobicistat
  • Cyclophosphamide
  • Daclatasvir
  • Darunavir
  • Desipramine
  • Dexlansoprazole
  • Digoxin
  • Docetaxel
  • Dolasetron
  • Droperidol
  • Efavirenz
  • Enzalutamide
  • Eplerenone
  • Erlotinib
  • Erythromycin
  • Eslicarbazepine Acetate
  • Esomeprazole
  • Fingolimod
  • Fluphenazine
  • Fluticasone
  • Fosamprenavir
  • Fusidic Acid
  • Garlic
  • Gatifloxacin
  • Gemifloxacin
  • Granisetron
  • Halofantrine
  • Haloperidol
  • Hydrocodone
  • Ibutilide
  • Idelalisib
  • Ifosfamide
  • Iloperidone
  • Imipramine
  • Ivacaftor
  • Ixabepilone
  • Lacosamide
  • Lansoprazole
  • Levofloxacin
  • Levomilnacipran
  • Loperamide
  • Lopinavir
  • Macitentan
  • Mefloquine
  • Methadone
  • Mitotane
  • Moxifloxacin
  • Norfloxacin
  • Nortriptyline
  • Octreotide
  • Ofloxacin
  • Omeprazole
  • Oxycodone
  • Paliperidone
  • Pantoprazole
  • Pazopanib
  • Pentamidine
  • Perflutren Lipid Microsphere
  • Perphenazine
  • Pixantrone
  • Pomalidomide
  • Ponatinib
  • Primidone
  • Procainamide
  • Prochlorperazine
  • Promazine
  • Promethazine
  • Protriptyline
  • Rabeprazole
  • Regorafenib
  • Retapamulin
  • Rifabutin
  • Rifapentine
  • Rivaroxaban
  • Rosuvastatin
  • Ruxolitinib
  • Salmeterol
  • Siltuximab
  • Simeprevir
  • Sirolimus
  • Sodium Phosphate
  • Sodium Phosphate, Dibasic
  • Sodium Phosphate, Monobasic
  • Sotalol
  • St John's Wort
  • Sunitinib
  • Tadalafil
  • Tamsulosin
  • Telavancin
  • Temsirolimus
  • Tetrabenazine
  • Ticagrelor
  • Tipranavir
  • Tocophersolan
  • Topotecan
  • Toremifene
  • Trifluoperazine
  • Triflupromazine
  • Trimipramine
  • Ulipristal
  • Vardenafil
  • Venlafaxine
  • Vincristine
  • Vincristine Sulfate Liposome

Using this medicine 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.

  • Alfentanil
  • Cerivastatin
  • Cimetidine
  • Cyclosporine
  • Dapsone
  • Delavirdine
  • Flunarizine
  • Gallopamil
  • Indinavir
  • Itraconazole
  • Lacidipine
  • Nelfinavir
  • Nevirapine
  • Nilvadipine
  • Nitrendipine
  • Tacrolimus
  • Voriconazole
  • Warfarin

Other interactions—

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.

Other medical problems—

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Alcoholism, history of or
  • Heart disease (e.g., cardiomyopathy, ischemia, congestive heart failure), history of or
  • Heart rhythm problems (e.g., arrhythmias, prolonged PR or QT interval), history of or
  • Hemophilia (a bleeding problem) or
  • Hyperlipidemia (high cholesterol or fat in the blood) or
  • Liver disease (e.g., hepatitis B or C)—Use with caution. May increase your chance for serious side effects.
  • Diabetes or
  • Hyperglycemia (high blood sugar)—Use with caution. May make these conditions worse.
  • Heart block without a pacemaker or
  • Heart rhythm problems (e.g., congenital long QT syndrome) or
  • Hypokalemia (low potassium in the blood), uncorrected or
  • Hypomagnesemia (low magnesium in the blood), uncorrected or
  • Liver disease, severe—Should not be used in patients with these conditions.
  • Lactose intolerance—Use with caution. Saquinavir capsules contain lactose.

Proper Use of This Medicine:

Take this medicine 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. Also, do not stop taking this medicine without checking first with your doctor.

This medicine should come with a Medication Guide. Read and carefully follow the instructions before starting treatment and each time you get a refill. Ask your doctor or pharmacist if you have any questions.

It is important that this medicine be taken with food in order to work properly. Take saquinavir within 2 hours after a meal.

Saquinavir capsules or tablets (Invirase®) should always be taken together, at the same time, with ritonavir (Norvir®). Take all other medicines your doctor has prescribed at the right time of the day. This will make your medicines work better.

If you are not able to swallow the capsules, open the capsules and pour the contents in an empty container. Add 15 mL of sugar syrup or sorbitol syrup or 3 teaspoons of jam to the container and stir for 30 to 60 seconds. Let the mixture come to room temperature. Eat the entire mixture to ensure to get the full dose.

This medicine works best when there is a constant amount in the blood. To help keep blood levels constant, take this medicine at the same time each day and do not miss any doses. It is best to take the doses at evenly spaced times, day and night. For example, if you are to take three doses a day, the doses should be spaced about 8 hours apart. If you need help in planning the best times to take your medicine, check with your doctor.

Dosing—

The dose of this medicine 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 this medicine. 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 treatment of HIV infection:
    • For oral dosage forms (capsules or tablets):
      • Taken in combination with ritonavir (Norvir®):
        • Adults and teenagers 16 years of age and older—1000 milligrams (mg) (5 capsules or 2 tablets) of saquinavir and 100 mg of ritonavir two times per day.
        • Children younger than 16 years of age—Use and dose must be determined by your doctor.
      • Taken in combination with lopinavir/ritonavir (Kaletra®):
        • Adults and teenagers 16 years of age and older—1000 milligrams (mg) (5 capsules or 2 tablets) of saquinavir and 400 mg of lopinavir plus 100 mg of ritonavir two times per day.
        • Children younger than 16 years of age—Use and dose must be determined by your doctor.

Missed dose—

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage—

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 This Medicine:

It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly. Blood tests may be needed to check for unwanted effects.

You should not take this medicine if you are also taking alfuzosin (Uroxatral®), cisapride (Propulsid®), oral midazolam (Versed®), pimozide (Orap®), rifampin (Rifadin®, Rifamate®, Rifater®, Rimactane®), sildenafil (Revatio®), trazodone (Desyrel®, Oleptro®), triazolam (Halcion®), medicine for heart rhythm problems (e.g., amiodarone, bepridil, dofetilide, flecainide, lidocaine, propafenone, quinidine, Cordarone®, Tambocor®, Tikosyn®), ergotamine medicines (e.g., dihydroergotamine, ergonovine, ergotamine, methylergonovine, Cafergot®, Ergomar®, Wigraine®), or medicine to lower cholesterol (e.g., lovastatin, simvastatin, Advicor®, Altoprev®, Mevacor®, Simcor®, Vytorin®, Zocor®). Taking any of these together with this medicine may increase the chance for serious side effects.

This medicine may decrease the effects of some oral contraceptives (birth control pills). To keep from getting pregnant, use an additional form of birth control together with your pills, such as condoms, a diaphragm, contraceptive foam or jelly.

Contact your doctor right away if you have any changes to your heart rhythm. You might feel dizzy or faint, or you might have a fast, pounding, or uneven heartbeat. Make sure your doctor knows if you or anyone in your family has ever had a heart rhythm problem such as PR or QT prolongation.

This medicine may increase blood sugar levels. Check with your doctor if you notice a change in the results of your blood or urine sugar tests.

Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, unusual tiredness or weakness, or yellow eyes or skin. These could be symptoms of a serious liver problem.

Your immune system may get stronger when you start taking HIV medicines. Tell your doctor right away if you notice any changes in your health. Sometimes the immune system will start to fight infections that were hidden in your body, such as pneumonia, herpes, or tuberculosis. Autoimmune disorders, such as Graves' disease, polymyositis, and Guillain-Barré syndrome may also occur.

This medicine may cause you to have excess body fat. Tell your doctor if you notice changes in your body shape, such as an increased amount of fat in the upper back and neck, or around the chest and stomach area; or a loss of fat from the legs, arms, and face.

Saquinavir does not decrease the risk of transmitting the HIV infection to others through sexual contact or by contamination through blood. HIV may be acquired from or spread to others through infected body fluids, including blood, vaginal fluid, or semen. If you are infected, it is best to avoid any sexual activity involving an exchange of body fluids with other people. If you do have sex, always wear (or have your partner wear) a condom (“rubber”). Only use condoms made of latex, and use them every time you have vaginal, anal, or oral sex. The use of a spermicide (such as nonoxynol-9) may also help prevent the spread of HIV if it is not irritating to the vagina, rectum, or mouth. Spermicides have been shown to kill HIV in lab tests. Do not use oil-based jelly, cold cream, baby oil, or shortening as a lubricant—these products can cause the condom to break. Lubricants without oil, such as K-Y Jelly, are recommended. Women may wish to carry their own condoms. Birth control pills and diaphragms will help protect against pregnancy, but they will not prevent someone from giving or getting the AIDS virus. If you inject drugs, get help to stop. Do not share needles or equipment with anyone. In some cities, more than half of the drug users are infected, and sharing even 1 needle or syringe can spread the virus. If you have any questions about this, check with your doctor.

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 (e.g., St. John's wort, garlic capsules) or vitamin supplements.

Side Effects of This Medicine:

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:

More common
Chest pain
cough
fever or chills
increased amount of fat in the upper back and neck, or around the chest and stomach area
loss of fat from the legs, arms, and face
sneezing
sore throat
tightness in the chest
troubled breathing
Less common
Blurred vision
cough-producing mucus
diarrhea
dry mouth
flushed, dry skin
fruit-like breath odor
general feeling of discomfort or illness
headache
increased hunger
increased thirst
increased urination
joint pain
loss of appetite
loss of consciousness
muscle aches and pains
nausea
runny nose
shivering
skin rash
sore throat
stomachache
sweating
trouble sleeping
unexplained weight loss
unusual tiredness or weakness
vomiting
Rare
Burning or prickling sensation
confusion
dehydration
dry or itchy skin

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:

Less common
Acid or sour stomach
back pain
belching
bloated or full feeling
change in taste
decreased interest in sexual intercourse
difficulty having a bowel movement (stool)
discouragement
excess air or gas in the stomach or intestines
fear
feeling sad or empty
headache
heartburn
inability to have or keep an erection
indigestion
irritability
lack of appetite
loss in sexual ability, desire, drive, or performance
loss of interest or pleasure
mouth ulcers
nervousness
pain or tenderness around the eyes and cheekbones
passing gas
skin rash, encrusted, scaly, and oozing
skin warts
stomach upset, discomfort, or pain
stuffy nose
tiredness
trouble concentrating
weakness

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.


Last Updated: 11/4/2014

Copyright © 1984- Thomson Micromedex. All rights reserved.

Thomson & A.D.A.M