Compensating for changes in potency of a medicament in a medicament delivery device

A medicament delivery device, comprising:

• a medicament storage;
• a pump for pumping medicament out of the storage for delivery to a user;
• a storage medium for storing data and computer programming instructions;
• a processor for executing the computer programming instructions, the computer programming instructions causing the processor to perform the following:
• calculating a basal dosage of a medicament to be delivered to a user by the medicament delivery device;
• determining an amount that at least one factor affects a potency of the medicament;
• and
• adjusting the calculated basal dosage of medicament to compensate for the determined amount that the at least one factor has affected the potency of the medicament.

A method performed by a processor in an on-body insulin delivery device, comprising:

• calculating a basal dosage for a user based on at least a current blood glucose level;
• calculating how much a potency of the insulin has decreased over a time period;
• and
• increasing the calculated basal dosage of the insulin to offset the calculated decrease in potency of the insulin.