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.
A prescription for Effexor XRÂ® 75-mg capsules dosed twice daily would cost about $279.98 for a 30-day supply, compared with a cost of $149.99 for a 30-day supply of Effexor XRÂ® 150-mg capsules dosed once daily. Venlafaxine is metabolized to its active metabolite, O-desmethylvenlafaxine (ODV).