1 The vast majority of people will never have an anaphylactic reaction. 2  The most common causes of anaphylaxis include drugs, such as penicillin, insect stings, foods (peanuts, shellfish), X-ray dye, and latex. 3  The symptoms of anaphylaxis may vary and can include hives, tongue swelling, vomiting, and even shock.
The recommended starting dose for prolonged-release venlafaxine is 75 mg given once daily. Patients not responding to the initial 75 mg/day dose may benefit from dose increases up to a maximum dose of 375 mg/day. Dosage increases can be made at intervals of 2 weeks or more.
So it can be said that at 75 mgs venlafaxine works as an SSRI. As the dose increases, so does its noradrenergic effect. It is believed that at a range of 150-225 mg a day, venlafaxine shows its dual activity as both serotonin and norepinephrine reuptake blocker.