Pharmaceutical Medicine Questions Pharmacist

Taking old Doxycycline?

My Dr prescribed my Doxycycline monohydrate. I have an old prescription of Doxycycline hyclate that I forgot to throw away. I accidentally took the hyclate while taking the monohydrate. Will it harm me?

Male | 47 years old
Complaint duration: 1 week
Medications: Doxycycline
Conditions: Infection

2 Answers

No you should be fine.
How old is the doxycycline? Typically as long as medications are stored in room temperature without temperature excursions, they are safe up to at least 6 months after their expiration date (which should be printed on the medication bottle). Remove these capsules somewhere you will not accidentally take them again, but this once will not harm you