Nasal testosterone is a newer and less commonly used form of testosterone therapy in Canada. It delivers testosterone through the nasal lining rather than the skin or muscle, offering an alternative for patients who prefer not to inject or use gels.
How Nasal Testosterone Works
Nasal testosterone is applied as a gel inside the nostrils, where it is absorbed through the nasal lining into the bloodstream. The medication acts quickly and is cleared more rapidly than injectable or topical forms. Because of its short duration of action, it must be used three times daily, typically about eight hours apart, to maintain stable testosterone levels.
This frequent dosing schedule can be challenging, but it offers flexibility and avoids long-term buildup or injection-related fluctuations. Because of the short duration, missing a dose can lead to a rapid drop in testosterone levels.
Benefits
Nasal testosterone offers several unique advantages:
- No skin transfer risk: Unlike gels, it poses no risk of testosterone transfer to others through contact.
- Rapid absorption: Testosterone levels rise quickly after dosing and decline predictably.
- Short washout period: If side effects occur, hormone levels return to baseline within days of stopping.
- Needle-free: An option for those who prefer to avoid injections or daily skin application.
Drawbacks and Considerations
- Frequent dosing: The three-times-daily schedule can be inconvenient for some users.
- Nasal irritation: Mild congestion or discomfort is common, especially at the start of therapy.
- Cost and availability: Typically more expensive and less widely stocked than injections or gels.
- Short duration: Missing a dose can cause testosterone levels to drop quickly.
Nasal testosterone is generally used by patients who cannot tolerate other forms or who prefer a short-acting, self-administered option.
Products Available in Canada
- Natesto (Testosterone Gel, 5.5%) – manufactured by Acerus Pharmaceuticals Corporation.
Because this is the only nasal testosterone product in Canada, shortages typically require switching to a different type of testosterone.
Public Coverage
Natesto is generally not included in provincial and territorial public drug benefit plans in Canada. As a result, access is often limited to private payment or private insurance coverage where available.
Shortages and Supply Context
Natesto has previously experienced shortages related to manufacturing issues and corporate restructuring. Although it is currently marketed in Canada, availability can fluctuate due to its small market size and limited production capacity. As the only nasal testosterone product in Canada, any disruption in production or distribution can directly affect national supply.
Nasal testosterone offers a unique, needle-free option for patients in Canada. It provides rapid absorption and eliminates the risk of skin transfer, but its frequent dosing and higher cost limit its use. With only one product available, this category remains small and highly dependent on a single manufacturer for ongoing supply.