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 venlafaxine is given to elderly patients the starting doses are the same as for other adults. As older people may be more sensitive to increases in dose they should be made slowly. While doses up to 375 mg per day are approved by the FDA, some severely depressed patients have been treated with higher doses.Most depressed people respond to doses under 300 mg per day.While most people taking venlafaxine become aware of some lessening of depression within two to four weeks, there are some who experience relief within the first week and others who only experience relief after a couple of months of therapy.o special problems were encountered when venlafaxine was prescribed for elderly people with depression. I usually start adults on 25 mg of venlafaxine every 12-hours. Every five days, I usually add 25 mg to each dose until the patient either responds or reaches reaches 150/day.