I think we have to be very careful at inferring drug abuse from aspects or indeed most astrological phenomena. Of the aspects listed at the start of the thread, only the Moon conjunct Neptune might (and I mean might) be relevant to the issue. However as the chart has no confirmed birth time it is very possible that the aspect does not exist in reality - indeed that is the most likely situation.
Of the remaining aspects, everyone in the world born that day will share them. If we allow an orb of say 4 degrees for our aspects (half what most texts advise), everyone in the world born within eight days will share them. The outer planet aspects can be safely ignored in terms of an person specific conclusion. One of the big problems with medical astrology is that we might well recognise astrological signatures of particular ailments presented, but what we can't know is the number of people with the same astrological signature that don't have and never will have these ailments. We might get round this by using the word 'potential' to contract the ailment but that doesn't really get us much further.
If aspects alone were indicators of drug abuse we would have to conclude that several million people born on that day are all drug addicts. Clearly that is extremely unlikely to say the least.
If we are going to apply Astrology to the situation we really need more information. An exact birth time so that we have accurate house positions would be a start. Houses and Signs are more important than aspects as a general rule, aspects modify the judgment based on the other two. Aspects that are partile (same degree) are stronger indicators than aspects of 2 or 3 degrees, and need to be coupled with several other factors.
Some overall assessment of temperament needs to be made (similar to luna's suggestion about emotional and mental stability) and this would be dominant in any assessment of susceptibility to drug abuse.
I've not mentioned transits, progressions and returns but thse too could shed some light on the situation. At best though, I think they might warn of possible dangers, one of which is drug abuse.
I certainly would not wish to diagnose drug abuse from a chart alone - it's too dangerous an exercise. If the problem is known, a chart might well help to determine treatment but probably an additional decumbiture chart would be necessary to give more insight into the illness. Astrology can help after the event but I don't think we can rely on it as some sort of screening service.
Edited to add:
I don't think that it is the type of aspect that is important but the exactness and I think I would also expect applying rather than separating aspects. Trines might actually be worse in such charts (allowing for other factors). I've seen a number of cancer charts with Jupiter trines - excessive growth which easily spreads to other areas of life. Again, sign and house are vital pieces of information to 'see' such links (following medical diagnosis).