Hi I am having a problem with the recommended dose of viridal 40mg.injection I have tried the lower dose of 20 mg to no avail, my Dr suggested I up it to 40 mg which is the full dose in the vial .even then I do not achieve a satisfactory erection that allows penetration, I am curious if any members has injected themselves twice with 25mg each time giving a dose of 50mg ?would that be wise ? forget the cost of using two cartridges to achieve this living in the UK our prescriptions are free !! Thanks