An ex-bridge

Drugs and Very Big Magnets

It’s been a little while since I’ve talked about depression, so let’s get back into that.

I do still find it quite difficult to write about while I’m in “the thick of it”, but I’ve had some more discussions with people with access to therapies and I’d also like to follow up on my promise to talk about the effects and various oddities of the current medications I have taken over the years.

Starting with recent events, I have now been referred by my GP to a psychiatrist. This gentleman took the single most complete history of my mental health that I have ever been asked for, and as a result we’ve got two elements that we’re going to follow up on. First, I am to be scheduled for an MRI of my brain – because it’s most likely my depressive episodes where triggered by my head injury they would like to see if there’s any visible structural damage to my grey matter. This is both wonderful and slightly scary, the idea that the source of my “self” could be physically scarred is a harsh reminder of the dependency principle, that you can be “turned off” with nothing more than a sharp blow to the head.

Secondly, I’m going to be taking rather more of my current medication, and I was ‘threatened’ with Lithium. This takes us rather neatly onto the drugs bit I’ve been promising for so long.

Lithium has been described to me before as the “Gold Standard” of mood stabilising drugs, and it’s was the first success story of the drug based treatment of psychological problems. Before the clinical use of lithium there was really no pharmacological approach, and it acted as a gateway to the development of modern psycho-actives. That’s not to say that it doesn’t have some issues, because it does. The effective dose is uncomfortably close to the “drop down dead” dose, and because lithium can take the place of other ions in the body a sub-lethal dose can become quickly lethal if you – for instance – become dehydrated. This is a bit of a disadvantage in terms of therapeutic usage.

Wind forward a few years and we go through the development of the tricyclics, the SSRIs and the SRNIs. These too, have side effects.

All drugs have side effects. It’s a comforting mental image to think of a drug as a perfectly shaped key that fits into a lock somewhere on the door that is a cell – this is after all what they teach us at school, more or less. This model is correct however only if you fill the door with locks, and each key can fit in multiple locks. And the door is made of jelly and can retreat from the key. And the locks change shape when the key is inserted. And there are different kinds of door, where the lock makes the door open differently. It’s really not a good metaphor – for more insight I’d suggest reading “In The Pipeline”, where Derek Lowe (an active drug discovery chemist) gives great insight into how drugs actually work. He seems to be moving blogs at the moment, but you can find his archive here.

The fact that each drug fits multiple “locks” and multiple different kinds of cell is what causes many of the side-effects. Each drug will not only hit it’s more or less understood target, but also several others (the purpose of which may not be quite so well understood). Also, differences between the exact state and setup of your body chemistry can mediate how many side effects you get; sometimes a drug will be well accepted, other times something you’ve taken for years can suddenly turn round on you and bite you. Now, I’ve taken a fair few of the anti-depressant drugs over the years, so here’s my who’s who of the pharmacopoeia – and an idea of what to expect if you’re talking about possible drug treatments with your GP or other brain-care specialist.

Another Bridge
Another Bridge – this one works

Lofepramine

This is probably the oldest drug that I was ever rotated through; it belongs to a class of medications called the “tricyclic” group – named for the shape of the molecule. Lofepramine was fairly rarely prescribed in the UK when I first start taking it, and it’s been largely replaced by SSRI’s as a first line treatment.

Compared to some of the other medications I have taken, the adaptation period was relatively mild and the side-effect profile relatively good. I did have a little dizziness and confusion for the first couple of days, but after that it was back to business as usual. At the time I was underweight (hitting less than 7.5 stone at one point), and I was really hoping that one of the advertised potential side effects of weight gain would pop up – no such luck.

I took Lofepramine as a first fix treatment, and I was moved off it when my mood failed to respond. After some consultation I was switched to Cipramil.

Cipramil

There’s a big warning in most of the leaflets I’ve read that says that SSRI’s like Cipramil should not be taken after tricyclics like Lofepramine without a “washing out” period after your last dose. That in fact didn’t happen when I switched, and because of that my first two days on this medication were not typical. I have a memory of cold sweats and Lucosade (if you’re not from the UK you may not have quite the same “I feel ill, I shall drink Lucosade” thing that we do over here). I also remember reading what was in hindsight a fairly pedestrian book and feeling like it was in the literary equivalent of immersive 3D with surround sound and a hidden bass-bin. As I say, not typical.

This was my first SSRI, and SSRI’s are the source of some controversy (of the type “do they even remotely work”, which isn’t good for a drug class). There’s some evidence that they are more effective in steep chronic depressions, as the placebo effect pretty much gets flattened by one of those, but there’s still some argument as to whether they are very helpful, or just slightly helpful.

In my first few depressions I tolerated Cipramil pretty well – not so in my most recent episode; that instead felt pretty much like having ants under my skin. There’s an effect that people who spend much time with SSRI’s talk about quite a lot, which is the feeling that you’re being electrically shocked every few moments. While it’s generally felt during discontinuation, I’ve found that it can creep up any time; this however was grim torture – almost constant “zapping” and shudders, badly disturbed sleep and mood problems. After only a fortnight I switched away to Duloexetine.

Now, because of my previous positive experiences with Cipramil, and despite my recent experience I certainly would consider using it again; and this is the thing with psycho-actives – you never really know how well tolerated or effective any of these medications are going to be until you try them. Despite how well tolerated Cipramil had been in the past, that was never any guarantee it’d be dealt with so well in the future. As a result, most treatment for depression tends to wander through the available compounds until something that is both effective and relatively gentle.

Duloexetine

My wife has slightly bad memories of Duloexetine, as after the initial adaptation period we found this one of the most heavily sedating drugs; to the point where I could occasionally fall asleep mid-sentence. This kept me off the motorbike for a fair time for obvious reasons; narcolepsy and rapid modes of transport are not good bedfellows.

Duloexetine is an SNRI, but not one you’ll have heard of if you’re Stateside – the FDA never approved it as an antidepressant over there over suicide and toxicity concerns. We gung-ho Brits stuck it through though, and it’s become a flagship for the SRNI gang over here. Rather than just raising the level of seratonin in your synapses, these drugs also prevent the re-uptake of norepinephrine – another important factor in mood regulation.

I stayed with this one for a good few months, but after a brief lift in mood it felt like things were slipping backward. This also was the worst anti-depressant to miss a dose of – the withdrawal effects of Duloexetine were fast, unpleasant and dependable. After my fifth wasted morning caused by missing my first dose of the day, one of my friends got me a key-fob pill box, and I’d seriously suggest investing in one if you’re considering an SRNI.

Venlafaxine and Mirtzipine

Having had no great luck with Duloexetine, and getting a little fed up of falling asleep so much, it was decided that it was time to switch to another SNRI. Known as Effexor in the States, this is often given in combination with Mirtazipine in a combination known as the “California Rocket Fuel”. Taken individually these drugs are good for mid-level depression, taken together they are considered an excellent hammer for smacking even the hardiest depression into submission.

Of all of the medications I have been rotated through, this combination has so far been both the gentlest in terms of side effect profile and adaptation period; I started feeling ‘normal’ within a couple of days – although the first dose of Mirtazipine will likely knock you flat next morning. It’s a moderately good sedative, and I did get a sleepy hangover the next morning, but there’s an effect called paradoxical sedation where the higher the dose you take, the less sedating the drug is. One thing to note is that Mirtazipine will almost certainly make you put on weight – I’m up a stone, and my cravings for sugar are almost unstoppable!

Unfortunately my current depression has been fairly resistant even to this potent combination. I did have two minor lifts in mood during the dose staging, but these faded after a week; hence my referral to the psychiatrist and the increased interest in the physical structure of my skull’s contents.

I hope that’s given you at least some idea of what you could face if you’re considering adding medication to your treatment plan for depression; if you’d like me to drill into any of those medications specifically then just pop a message in the comments and I’ll queue it up for a future post.

Leave a Reply

Your email address will not be published. Required fields are marked *