Just like dry eyes, dry mouth is a common negative reaction to too much THC. This symptom may be very uncomfortable and at times even dangerous – when you’re munching on potato chips or something like that and risk choking. Luckily for long-time recreational smokers and medical patients alike, this negative effect will be less pronounced and then disappear completely, as you build up tolerance to THC. If you’re not there yet, take a look at this list of strains that, according to user reviews, are most likely to cause dry mouth – you probably want to avoid them until you have more experience with cannabis.