Each call sign may be used for 15 days from its issue.

Don't use them for more than 3 days in a row.

I have used it for 2 days now and feel great!

In the 2010 fiscal year the base was used for 320 days.

Do not use for more than 7 days without first consulting your doctor.

They usually should not be used for more than about 3 days.

But do not use them for more than 5 to 7 days in a row without talking with your doctor.

But these should not be used for more than a few days straight because they may make symptoms worse.

Each pen may be used for up to 28 days.

Do not use the same spot again for at least 14 days.