What education should be provided to a patient beginning Xywav (low‑sodium oxybate) therapy?

Patient Education for Starting Xywav (Low-Sodium Oxybate)

Patients starting Xywav must understand that this is a powerful CNS depressant with serious risks including respiratory depression, profound sedation, and death—especially when combined with alcohol or other sedatives—and they must avoid all activities requiring alertness for at least 6 hours after each dose. 1

Critical Safety Information

Black Box Warnings and Controlled Substance Status

Educate patients that Xywav:

• Is a Schedule III controlled substance containing the active form of GHB (gamma-hydroxybutyrate), a Schedule I substance 2
• Carries an FDA black box warning for CNS depression and respiratory depression 2
• Can cause seizures, respiratory depression, decreased consciousness, coma, and death when abused or combined with other CNS depressants 2
• Is only available through the XYWAV and XYREM REMS program via a certified central pharmacy 2, 1

Absolute Contraindications

Patients must completely avoid:

• Alcohol - this is an absolute contraindication 1
• All sedative hypnotics - including benzodiazepines, opioids, sedating antidepressants, antipsychotics, sedating anti-epileptic medications 1

Timing and Administration

Dosing Schedule

Inform patients that:

• Take at least 2 hours after eating to optimize absorption 1
• Most patients take twice-nightly dosing with the second dose 2.5-4 hours after the first 1, 3
• Remain in bed immediately after taking each dose - sleep onset typically occurs within 5-15 minutes 1
• Falls have occurred when patients stand or rise from bed after dosing, sometimes requiring hospitalization 1

Activity Restrictions

Patients must avoid for at least 6 hours after taking Xywav:

• Driving any vehicle
• Operating heavy machinery
• Flying an airplane
• Any activity requiring full alertness or motor coordination 1

Expected Effects and Side Effects

Common Adverse Events

Prepare patients for these frequently reported side effects 2:

• Nausea (most common)
• Dizziness
• Headache
• Nocturnal enuresis (bedwetting)
• Sleep disturbances
• Vomiting
• Confusion

Serious Psychiatric Risks

Instruct patients to contact their provider immediately if they experience: 1

• Depressed mood
• Loss of interest in usual activities
• Significant weight or appetite changes
• Increased fatigue or feelings of worthlessness
• Suicidal thoughts
• Confusion, anxiety, or psychosis
• Sleepwalking or other sleep behaviors

Respiratory Concerns

Inform patients that Xywav may:

• Impair respiratory drive, especially in those with compromised respiratory function
• Cause or worsen sleep-disordered breathing 1

Special Populations

Pregnancy and Reproductive Considerations

Educate patients that:

• Based on animal data, Xywav may cause fetal harm 2
• Human data are insufficient to determine risk
• The balance of risks differs for pregnant and breastfeeding women 2
• Discuss pregnancy planning with their provider before starting treatment

Treatment Expectations

Therapeutic Benefits

Set realistic expectations that Xywav treats 2:

• Excessive daytime sleepiness - clinically significant improvements demonstrated
• Cataplexy (in narcolepsy type 1) - clinically significant improvements
• Overall disease severity - improvements in quality of life and functioning

Titration Process

Explain that:

• Treatment typically starts at a lower dose and is gradually increased over 2-8 weeks 3, 4
• The goal is to find the optimal dose for symptom control while minimizing side effects 3
• Most patients require individualized dosing adjustments 3, 5
• Some patients may need doses above 9g/night for optimal benefit 6

Practical Considerations

Storage and Disposal

Inform patients to:

• Store securely to prevent abuse and misuse 1
• Dispose safely down the sanitary sewer 1
• Never share medication - selling or giving away Xywav is illegal and dangerous 1

REMS Program Requirements

Explain that patients must:

• Enroll in the XYWAV and XYREM REMS program 1
• Receive medication only from the certified central pharmacy 1
• Medication will be shipped directly to their home

Ongoing Communication

Emphasize the importance of:

• Frequent communication with the healthcare team, especially during titration 7
• Regular follow-up appointments to assess effectiveness and adjust dosing 2, 3
• Reporting any side effects or concerns promptly
• Discussing any changes in other medications or health conditions

Common Pitfalls to Avoid

Critical errors that compromise safety:

• Taking Xywav too soon after eating (wait full 2 hours) 1
• Getting out of bed after taking a dose
• Combining with alcohol or sedatives
• Driving or operating machinery within 6 hours
• Missing the second nightly dose timing (must wait 2.5-4 hours) 1

The key to successful Xywav therapy is strict adherence to safety protocols, particularly avoiding CNS depressants and maintaining proper timing of doses relative to meals and sleep. 1 Patients who understand these requirements and maintain open communication with their healthcare team achieve the best outcomes with this highly effective but potentially dangerous medication.