Once you start your treatment, you'll be opted-in to a subscription plan. This is because treatment is only effective if done consistently. With each treatment kit, you'll receive a 3-months supply of allergy drops at a time. You'll be billed for your treatment kit before your 3-month supply is completed to ensure the timely arrival of your next shipment. You can expect to receive an email reminder before the billing and shipment of your next kit occur. You'll also have the option to cancel your subscription at this time.