You can carry medicines in your checked baggage to Germany, but it is highly discouraged by travel experts and customs officials. First, if your luggage is delayed or lost, you lose access to essential health supplies. Second, cargo holds are not always temperature-controlled, which can degrade the efficacy of certain medications. From a legal standpoint, German customs allow you to bring a "personal supply" (typically defined as a three-month supply) of most medications without a specific permit. However, for controlled substances or "narcotics" (like some strong painkillers or ADHD meds), you must have a multilingual doctor's certificate. If you do put them in checked bags, keep them in their original packaging with the prescription label clearly visible. It is generally safer to keep all essential medications in your carry-on, where they are exempt from the standard 100ml liquid restrictions, provided you declare them to security during the screening process.