Important Safety Information

Draft for clinical and counsel review · Last updated July 2026

Read this before starting any Xilo protocol. This page summarizes safety information for the product categories offered through Xilo. It is not complete prescribing information. Your provider will review the specific medication, strength, and risks that apply to you before prescribing, and you should ask every question you have.

Production-stimulating oral testosterone therapy (Testosterone RX; component of Testosterone RX+)

Do not use if you have

• A history of hypersensitivity to the prescribed medication or its components.
• Certain hormone-sensitive cancers, active or historical, unless your provider determines otherwise with your oncologist.
• Significant liver disease, untreated clotting disorders, or other conditions your provider identifies during screening.

Commonly reported side effects

• Headache
• Nausea
• Hot flashes
• Mood changes, including irritability
• Acne or oily skin

Serious risks: stop and seek care immediately

• Visual disturbances (blurring, floaters, blind spots). Stop the medication and contact your provider immediately.
• Signs of a blood clot: leg swelling or pain, chest pain, sudden shortness of breath. Seek emergency care.
• Severe mood changes, including depression or thoughts of self-harm. Seek care immediately; the 988 Suicide and Crisis Lifeline is available 24/7.

Daily performance-support medication (component of Testosterone RX+)

Do not combine with

• Nitrates in any form (nitroglycerin, isosorbide). The combination can cause a dangerous drop in blood pressure.
• Certain alpha-blockers and blood-pressure medications, unless your provider explicitly approves the combination.
• Recreational "poppers" (amyl nitrite).

Commonly reported side effects

• Headache, flushing, nasal congestion
• Indigestion
• Muscle aches or back pain

Serious risks: seek care immediately

• An erection lasting more than 4 hours (priapism) is a medical emergency; permanent damage can result without prompt treatment.
• Sudden vision loss or sudden hearing decrease or loss.
• Chest pain during sexual activity.

T-Base Daily (dietary supplement)

• These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
• Consult your provider or pharmacist before use if you take thyroid medication, antibiotics, sedatives, or blood thinners, or have a medical condition.
• Keep out of reach of children. Do not exceed the labeled dose.

Regulatory notes that apply across products

• Prescription products require an online consultation with a licensed healthcare provider who will determine if a prescription is appropriate. A prescription is never guaranteed.
• Where compounded medications are used, they are prepared by licensed US pharmacies. Compounded drugs are not FDA-approved and have not been evaluated by the FDA for safety, effectiveness, or quality.
• Product availability varies by state.
• Lab testing is a screening tool and does not by itself diagnose any condition.

Reporting

Report side effects to your provider through your account, and to the FDA's MedWatch program. In an emergency, call 911 first.