The following list shows the rates of adverse symptoms seen in people taking venlafaxine.
Very common (>10% incidence) Headache — an often transient side effect that is common to most serotonin reuptake inhibitors and that most often occurs at the beginning of therapy or after a dose escalation. Nausea — an adverse effect that is more common with venlafaxine than with the SSRIs. Usually transient and less severe in those receiving the extended release formulations. Insomnia Asthenia (weakness) Dizziness Ejaculation disorder — sexual side effects can be seen with virtually any antidepressant, especially those that inhibit the reuptake of serotonin (including venlafaxine). Somnolence Dry mouth Sweating Withdrawal
Common (1–10% incidence)
Uncommon (0.1-1% incidence)
Rare (0.01–0.1% incidence) Syndrome of inappropriate antidiuretic hormone secretion (SIADH) Thrombocytopenia Prolonged bleeding time Seizures Mania Neuroleptic malignant syndrome (NMS) Serotonin syndrome Akathisia/psychomotor restlessness Urinary incontinence
Very rare (<0.01% incidence)
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