Question: What drug is the main ingredient referenced in the "drank" of the song Drank in My Cup?

Context paragraphs:
I Got a Love: "I Got A Love" is the first single from Pete Rock & CL Smooth's second album, "The Main Ingredient", released in 1994.  The song is a horn and guitar-driven love-jam, which sees CL exploring his "ladies man" persona which he first introduced on "Lots of Lovin'".  It samples "Ain't Got the Love (Of One Girl on My Mind)" by The Ambassadors.  The B-Side is the title track from "The Main Ingredient".  The single also contains a downtempo remix of "I Got A Love".

Take You There (Pete Rock &amp; CL Smooth song): "Take You There" is the second single from Pete Rock & CL Smooth's second album, "The Main Ingredient", released in 1994.  The song samples "Keep Rising To The Top" by Keni Burke.  It features vocalist Crystal Johnson on the chorus.  The B-Side is a remix of the album track "Get On The Mic" from "The Main Ingredient".  The song peaked at #76 on the "Billboard" Hot 100.

Callaloo: Callaloo (sometimes calaloo or kallaloo) is a popular Caribbean dish originating in West Africa served in different variants across the Caribbean.  The main ingredient is a leaf vegetable, traditionally either amaranth (known by many local names, including "callaloo" or "bhaaji"), taro or "xanthosoma".  Both are known by many names, including "callaloo, coco, tannia, bhaaji", or "dasheen" bush.  Because the leaf vegetable used in some regions may be locally called "callaloo" or "callaloo bush", some confusion can arise among the vegetables and with the dish itself.  Outside of the Caribbean, water spinach is occasionally used.  Trinidadians, Grenadians and Dominicans primarily use taro/dasheen bush for callaloo, although Dominicans also use water spinach.  Jamaicans, Belizeans and Guyanese on the other hand use the name callaloo to refer to amaranth, and use it in a plethora of dishes and also a drink ('callaloo juice').  The 'callaloo' made in Jamaica is different from the 'callaloo' made in Trinidad and Tobago and Grenada in terms of main ingredient (the leaf used) and other ingredients included (for example, Jamaicans tend to use only callaloo leaf, salt, onions, and scallions, and simply steam the vegetable, while Trinidadians use okra and coconut milk to make a different dish with a different taste and consistency).

Assamese cuisine: Assamese cuisine () is the cuisine of Assam.  It is a style of cooking that is a confluence of cooking habits of the hills that favor fermentation and drying as forms of food preservation, and those from the plains that provide fresh vegetables and abundance of fish from its many rivers and ponds; both of which are centered on the main ingredient—rice.  The confluence of varied cultural influences in the Assam Valley has led to the staggering variety and flavours in the Assamese food.  It is characterised by the use of an extremely wide variety of plant as well as animal products, owing to their abundant availability in the region.  It is a mixture of different indigenous styles with considerable regional variations and some external influences.  The cuisine is characterized by very little use of spices, little cooking over fire and strong flavors due mainly to the use of endemic exotic fruits and vegetables that are either fresh, dried or fermented.  Fish is widely used, and birds like duck, squab etc. are very popular, which are often paired with a main vegetable or ingredient.  Preparations are rarely elaborate mash;the practice of Bhuna, the gentle frying of spices before the addition of the main ingredients so common in Indian cooking, is absent in the cuisine of Assam.  The preferred oil for cooking is the pungent mustard oil.

Ngapi: Ngapi (Burmese: ငပိ or ငါးပိ ] , literally "pressed fish"), formerly also spelled ngapee, nga-pee, and gnapee, is a generic term for pungent pastes made of either fish or shrimp in Burmese cuisine.  Ngapi is usually made by fermenting fish or shrimp that is salted and ground then sun dried.  Many variations exist.  "Ngapi" is a generic term which applies only to the content.  Like cheese, it can be distinguished based on main ingredient and regional origin.  Ngapi can be distinguished from the type of fish used to make it.  Ngapi can come from whole fish (such as ngapi kaung), from small fish (mhyin ngapi) or from prawns.  Ngapi is a main ingredient of Lower Burmese cooking and is used as a condiment or additive in most dishes.  Raw ngapi is not intended for direct consumption.

Drank in My Cup: "Drank in My Cup" is a song by American rapper Kirko Bangz.  It is taken from his mixtape "Progression 2: A Young Texas Playa".  The Sound M.O.B. produced single is his highest charting song to date and has sold 1,000,000 copies digitally.  The song uses the word 'drank' a number of times as a clear reference to purple drank, a codeine-promethazine cocktail served in Sprite, a drink symbolic of the H-Town hip-hop scene, classically associated with chopped and screwed music.  The song is full of references to this music scene, including the slow, relaxed rhythm of the song.

Purple drank: Purple drank is a slang term for a concoction which includes a prescription-strength cough syrup used in a manner inconsistent with its labeling, thus making it a recreational drug.  The mixture became popular in the hip hop community in the southern United States in the 1990s, originating in Houston.

Mushroom ketchup: Mushroom ketchup is a style of ketchup (also spelled "catsup") that is prepared with mushrooms as its primary ingredient.  Originally, ketchup in the United Kingdom was prepared with mushrooms as a primary ingredient, instead of tomato, the main ingredient in contemporary preparations of ketchup.  Historical preparations involved packing whole mushrooms into containers with salt.  It is used as a condiment and may be used as an ingredient in the preparation of other sauces and other condiments.  Several brands of mushroom ketchup were produced and marketed in the United Kingdom, some of which were exported to the United States, and Geo Watkins Mushroom Ketchup continues to exist in contemporary times as a commercially mass-produced product.

Isoamyl alcohol: Isoamyl alcohol (also known as isopentyl alcohol) is a clear, colorless alcohol with the formula (CH)CHCHCHOH.  It is one of several isomers of amyl alcohol.  It is a main ingredient in the production of banana oil, an ester found in nature and also produced as a flavouring in industry.  It is also the main ingredient of Kovac's reagent, used for the bacterial diagnostic indole test.

I Smoke, I Drank: "I Smoke, I Drank", also known as "Do It Big", is the lead single from Body Head Bangerz's debut album, "".  The original track features Lil' Boosie and Young Bleed but only the remix of the song, "I Smoke, I Drank (Remix)" featuring YoungBloodZ, charted.  Though only the latter charted, it is often credited as simply "I Smoke, I Drank".  This single, along with Body Head Bangerz's second single, "Can't Be Touched" featuring Trouble Tha Truth, helped the group earn widespread recognition among hip hop enthusiasts.

Supporting paragraphs: Drank in My Cup Purple drank
Answer: cough syrup