The most frequent side effects, occurring in 20% or more of users, are dry mouth, drowsiness, dizziness, constipation, and weight gain (on average 1.8 kg). Other common side effects (in 10% or more) are vision problems (amblyopia, blurred vision), tachycardia, increased appetite, tremor, fatigue/asthenia/feeling slowed down, and dyspepsia. A literature review about abnormal movements and<unk>  found that this drug is associated with various movement disorders, particularly dyskinesia, dystonia, and myoclonus. Stuttering and restless legs syndrome are some of the less common associations. A less common side effect of<unk>  is urination problems (8.7%).<unk> -associated sexual dysfunction (occurring at a frequency of 6.9%) seems to be mostly confined to males with depression and is expressed predominantly as erectile dysfunction and low libido disorder, with lesser frequency of ejaculatory and orgasmic problems. The rate of sexual dysfunction in males treated for indications other than depression and in females is not significantly different from placebo. Liver tests abnormalities occur in 10-12% of patients on<unk> , but are usually mild, asymptomatic and transient, with consistently elevated alanine transaminase in 3% of all patients. The increases of the enzymes above the 3-fold threshold of liver toxicity are uncommon, and cases of clinically apparent liver toxicity are rare; nevertheless,<unk>  is placed in the group of antidepressants with greater risks of hepatic toxicity.<unk>  prolongs the QT interval. This prolongation is relatively small at therapeutic doses but becomes severe in overdose.
Amitriptyline
Nortriptyline
Venlafaxine
Trazodone
Guanfacine
Nabilone
Citalopram
Atomoxetine