Invirase (Saquinavir)
Complete patient guide for uses, dosage, side effects, and safety information
Quick Facts
What Is Invirase Used For?
Invirase is an anti-HIV medication that helps manage HIV infection by disrupting the virus's ability to reproduce.
Primary Uses
Invirase is primarily used for the treatment of HIV (Human Immunodeficiency Virus) in combination with ritonavir and other antiretroviral medications.
How It Works
Invirase works by interfering with the viral reproductive cycle, helping to control the infection.
Good to know: Invirase is not addictive.
Continue Reading
Sign in to access the complete medication guide including dosage, side effects, warnings, and more.
How to Take Invirase
Invirase should be taken exactly as prescribed by your healthcare provider.
Dosage Instructions
The typical dosage is two 500 mg tablets taken twice daily, along with one 100 mg capsule of ritonavir, also taken twice daily. If you are new to treatment, the initial dose is one 500 mg tablet twice daily for the first week.
What If You Miss a Dose?
If you miss a dose, take it as soon as you remember with food. If it's almost time for your next dose, skip the missed dose. Do not take a double dose.
Important: Never double the dose to make up for a missed one.
Available Tablet Strengths
Side Effects
Like all medications, this medicine can cause side effects. Most are mild and temporary, but some require medical attention.
Common Side Effects
These side effects occur relatively frequently and usually don’t require emergency care:
- Diarrhea
- Constipation
- Stomach discomfort
- Dizziness
- Headache
- Fatigue
- Skin rash
Seek immediate medical attention if you experience:
- Shortness of breath
- Severe allergic reactions
- Heart rhythm changes
- Increased bruising or bleeding
Impulse Control Issues
Some patients may experience impulse control issues, including gambling or spending problems.
Important Warnings
There are several important considerations before taking Invirase.
Who Should Not Take Invirase
Do not take Invirase if you have severe liver disease, allergies to saquinavir, certain heart conditions, or if you are taking specific medications that can cause abnormal heart rhythms.
Medical Conditions to Discuss
Inform your doctor if you have a history of heart problems, liver disease, kidney disease, diabetes, or any other significant health issues.
Pregnancy and Breastfeeding
The effects of Invirase during pregnancy and breastfeeding are not fully known. Discuss with your doctor if you are pregnant or plan to become pregnant or if you are breastfeeding.
Elderly Patients With Dementia: Elderly patients should be cautious, as Invirase may affect heart rhythms.
Drug Interactions
Invirase can interact with various medications, which may require dosage adjustments.
Grapefruit interaction: Avoid grapefruit juice as it may affect how Invirase works.
- Certain heart medications (e.g., amiodarone, dofetilide)
- Antibiotics (e.g., clarithromycin, erythromycin)
- Antidepressants (e.g., trazodone)
- Antihistamines (e.g., astemizole)
- Other HIV medications (e.g., atazanavir, efavirenz)
- Grapefruit juice
Alcohol & Driving
Be cautious when consuming alcohol or driving while on Invirase.
Alcohol
Limit alcohol intake as it may exacerbate side effects.
Driving and Operating Machinery
Invirase may cause dizziness in some individuals; ensure you know how it affects you before driving.
Storage
Store Invirase in a cool, dry place below 30°C, away from moisture and heat. Keep out of reach of children.
Overdose Information
If you suspect an overdose, contact your doctor or local poison control center immediately, even if no symptoms are present.
Frequently Asked Questions
Invirase helps control HIV infection but does not cure it. Continue taking it as prescribed for the best results.
Yes, taking Invirase with a meal that is high in calories, fat, and protein can enhance absorption.
No, Invirase is not considered addictive.
Do not stop taking Invirase without consulting your doctor, as this may affect your treatment.
Limit alcohol consumption while on Invirase, as it may increase side effects.
Weight changes can occur, but specific effects vary by individual.
Elderly patients should be cautious, especially if they have heart conditions.
If you miss a dose, take it as soon as you remember with food, but skip it if it's almost time for your next dose.
Important Disclaimer
This information is intended for general educational purposes only and should not be considered medical advice. Always consult your healthcare provider or pharmacist before starting, stopping, or changing any medication.
If you think you may have a medical emergency, call your doctor or emergency services immediately.