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.
When Effexor (venlafaxine) is to be stopped it is recommended to taper the dose for anyone who has been on the medication greater than one week. If Effexor (venlafaxine) has been used for more than six weeks, it is recommended to taper the dose down over at least two weeks. Your health care provider will be able to give you a dosage taper, how you should slowly decrease the dose over at least two weeks.