As of my knowledge cutoff in September 2021, melatonin inhalers were not commonly available, and specific information about the duration of their effects may be limited. However, I can provide some general information about the duration of melatonin's effects.
Melatonin is known for its role in regulating the sleep-wake cycle, and its effects can vary depending on factors such as the individual's metabolism, dosage, and form of administration.
When taken orally in tablet or capsule form, the effects of melatonin typically start within 30 minutes to an hour and can last for several hours. The exact duration of the effects may vary between individuals.
If melatonin inhalers exist, the duration of their effects may differ depending on the specific product and the method of delivery. It is recommended to follow the instructions provided by the manufacturer or consult with a healthcare professional for more accurate information on the duration of effect for melatonin inhalers.
Please note that beyond my knowledge cutoff, new products and developments may have occurred. It is always advisable to consult reliable sources or healthcare professionals for the latest information on the duration of effects of melatonin inhalers.