Amitriptyline, molecular model. Amitriptyline is a tricyclic antidepressant (TCA) drug. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white) and nitrogen (blue).

Cetirizine antihistamine, molecular model. Atoms are represented as spheres and are colour-coded; carbon (grey), hydrogen (white), nitrogen (blue), oxygen (red) and chlorine (green).

Aspirin, molecular model. Aspirin (acetylsalicylic acid) is an analgesic (painkiller) drug. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white) and oxygen (red).

Naproxen, molecular model. This is an anti-inflammatory and analgesic (painkiller) drug. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white) and oxygen (red).

VX nerve agent, molecular model. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue) oxygen (red), phosphorous (orange) and sulphur (yellow).

Paracetamol, molecular model. This is an analgesic (painkiller) drug. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red) and nitrogen (blue).

Histidine. Molecular model of the amino acid histidine. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red) and nitrogen (blue).

Methyltestosterone, molecular model. This is an anabolic steroid drug. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white) and oxygen (red).

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Amitriptyline drug molecule

RDX, molecular model. This explosive is also known as T4 and cyclonite. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red) and nitrogen (blue).

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Cubane molecular model, artwork

"Prednisolone corticosteroid drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red). "

"Neostigmine drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Paromomycin aminoglycoside antibiotic drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Neostigmine drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Tetracaine local anesthetic drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Indacaterol COPD drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Lumefantrine (benflumetol) antimalarial drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green). "

"Lumefantrine (benflumetol) antimalarial drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green). "

"Lumefantrine (benflumetol) antimalarial drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue), chlorine (green). "

"Tetracaine local anesthetic drug molecule. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

"Praziquantel anthelmintic drug molecule. Used to treat tapeworm infections. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (grey), oxygen (red), nitrogen (blue). "

White and grey model figures hugging