In this bonus episode Suzi is joined by Dr Carl Roberts, a psychopharmacologist from the University of Liverpool, to chat about cognitive enhancers. Who's using them? Do they work? What do we know about them?

Dr Suzi Gage is joined by Dr Charlotte Hardman from the University of Liverpool - an expert on nutrition, to talk about sugar. Is it a drug? It's essential to life but do we eat too much of it?

Welcome back to Say Why to Drugs! In this special episode Suzi speaks to Professor Sir John Strang, head of the Addictions group at Kings College London, about the concept of addiction.

Dr Suzi Gage and Scroobius Pip discuss prescription opioid pain medication, its potential for abuse, and why this might differ between countries.

Dr Suzi Gage and Scroobius Pip chat about DMT - a psychedelic that has been used ritualistically for hundreds of years, which has a mystical and intriguing reputation.

Scroobius Pip talks with Dr Suzi Gage about PCP - a drug that has in the past had a lot of media attention due to its purported extreme effects. But what's the evidence?

Suzi Gage and Scroobius Pip talk about salvia, and unusual dissociative psychedelic that has short lasting but quite extreme psychedelic effects.

Dr Suzi Gage and Scroobius Pip chat about a group of synthetic medications called benzodiazepines.

A special episode of Say Why to Drugs, where Dr Suzi Gage talks to hangover researcher Dr Sally Adams from the University of Bath about why we feel so wretched the day after a heavy drinking session, and what it's like to try and research in this area.

Dr Suzi Gage and Scroobius Pip chat about e-cigarettes - the scientific evidence around them, and why it might be that they've been so divisive in the academic community. For further reading listen via the Acast app where links will pop up at relevant moments!

After a short festive (and moving house) break, Say Why to Drugs is back. Suzi and Scroobius Pip chat about khat, a leaf that's chewed to give a mild stimulant effect

Suzi Gage and Scroobius Pip discuss poppers, also known as alkyl nitrites, in this episode. And Suzi explains why it's a week late (sorry!)

Scroobius PIp and Dr Suzi Gage discuss amphetamines, their harms and potential benefits, and the myths surrounding them.

Dr Suzi Gage and Scroobius Pip discuss heroin and the evidence surrounding its effects in this episode of Say Why to Drugs

Episode 11 is a return to the usual format. Scroobius Pip and Dr Suzi Gage sit down and chat caffeine. As well as this, Suzi has some exciting news in the intro.

A bonus episode where Dr Suzi Gage meets with Lydia Davenport and Professor Graeme Henderson, who are involved with Bristol Drugs Project.

Scroobius Pip and Suzi discuss drugs including mephedrone - formerly known as legal highs, these fall under the category of synthetic cathinones.

Dr Suzi Gage and Scroobius Pip chat about synthetic cannabinoids - substances such as Spice, in this episode.

Suzi and Scroobius Pip chat about nitrous oxide, otherwise known as laughing gas, or hippy crack.

Suzi and Scroobius Pip talk about cocaine in this episode - a substance that can be taken in a number of different forms, and has quite different effects depending how its consumed.

Dr Suzi Gage and Scroobius Pip discuss psychedelics, including LSD, magic mushrooms and DMT. The risks of taking them, but also potential medical benefits currently being investigated. As well as discussing myths surrounding psychedelics.

In episode 5, Dr Suzi Gage and Scroobius Pip chat about ketamine. It can be harmful if used frequently, but it's also an extremely useful medication, used all over the world.

In this episode Scroobius Pip and I talk about Ecstasy or MDMA. We talk about the risks, the myths, and some really cool research in to some potential benefits.

Dr Suzi Gage and Scroobius Pip discuss booze on this episode, the drug of choice in the UK and elsewhere. Although its legal, and often barely considered as a drug, it's by no means a safe substance.

In episode two of Say Why to Drugs, Suzi and Scroobius Pip chat about tobacco - the effects of it, what harms there are from using it, whether it might have any benefits, and whether many of the myths surrounding it are based in evidence.