Another common cause of bad breath or halitosis is the use of medications. Many different medications have different side-effects and quite often mouth dryness is one of the most common ones.

This applies to all kinds of medication: penicillin cures, painkillers, anti-depressants and even chemo therapy.

How to deal with mouth dryness and bad breath caused by medications
If you want to deal with the bad breath and mouth dryness that whatever medication you’re using is causing, one of the easiest ways is to drink plenty of water. The reason for this can be found here.

Another option is to consult your doctor. In many cases, there are similar medications to the ones you’re using available on the market. Your doctor might recommend similar ones that are less likely to cause mouth dryness.