Sugar provides energy, which if not used, will be converted into fat and stored in the body. If you are conscious of your weight, choose low calorie and sugar-free drinks and try to avoid sugary snacks. Go for high fibre options instead, for example fruit, teacake or toast.
As long as there are no contraindications with your medications alcohol is safe to drink. You should not regularly exceed the recommended daily limits: three to four units/day for men or two to three units/day for women. Excessive alcohol may reduce the effectiveness of some of your medications.