Sometimes the tinnitus will stop if you take only a short course of some of the medication, however, most medication on the market today when taken on a regular basis will cause long-term tinnitus. Drug categories such as antibiotics, cancer meds and diuretics or water pills are all known to cause tinnitus. Even taking them for only a few days may give you lasting effects of ringing in the ears. That is why it is paramount to speaking with your health care providers about taking any type of medicine and what type of side effects, particularly ringing in the ears is possible, since most physicians don't even think about that. Pharmacist are your go-to professional regarding this as well since they know more about this than your doctors.
I have had tinnitus since my encounter with C.diff when I was treated with 4 different antibiotics to save me. The tinnitus came on with a vengeance and never left. I will have it until I die. It is a fact of life. I live with it and don't really think about it. It is two tones. A squeal in both ears - I use my hearing aids to muffle the sounds - a special program that I love to use 10-12 hrs a day.
I use to hate the noise since I can hear it day and night but it reminds me that I am alive rather than dead....it's a reminder for me.
Also, there is so much research going on right now about tinnitus and where it is in the brain and what it truly is... This is worth your while to track your story and stay on top of it. Mine is influenced by emotions, sleep, salt, sugar, migraines, exposure to sun, and if my neck is out of wack. I avoid antibiotics, never take water pills, and limit/avoid any meds that contribute to my vertigo that I have daily. My physicians already know and track all of my medicines since I am a high risk for falling with the hearing loss, hyperacusis, and osteoporosis. What is your story? It all has some relationship....with each other. Eloise

That is a good question, @kathyhg. Here is a chart by PubMed that lists a lot of drugs that cause hearing problems including tinnitus.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3138949/
I have personally found that anti-inflammatories are a big problem. I take one ibuprofen a day, but if I increase that amount my tinnitus will increase.