Table 4.

Pattern of energy drinks usage

Serial number	Variables	Energy drinks users
1	*What is the most common adverse/withdrawal effect of energy drinks you experience? (multiple choice)
	Fatigue	111 (31.7%)
	Dehydration	49 (14%)
	Increase heart rate	55 (15.7%)
	Increase blood pressure	33 (9.42%)
	Tremors	29 (8.28%)
	Muscle stiffness and aches	14 (4%)
	Vomiting ,nausea and abdominal pain	37 (10.57%)
	Insomnia	42 (12%)
	Inability to focus	61 (17.42%)
	I don’t know	60 (17.14%)
	No adverse and with drawl effect come ,according to my experience, they are just rumors	106 (30.28%)
	Headache	39 (11.14%)
2a	In past 12 month how often you use it
	Daily	142 (40.57%)
	Weekly	107 (30.5%)
	Monthly	101 (28.8%)
2b	How many canes or bottle of energy drinks did you use daily, weekly or monthly in Past 12 months?
	1 cane	124 (35.4%)
	2 cane	70 (20%)
	3 cane	27 (7.71%)
	4 cane	29 (8.28%)
	1 bottle	28 (8%)
	2 bottle	32 (9.14%)
	3 bottle	13 (3.71%)
	4 bottle	27 (7.71%)
3	Withdrawal/adverse effects are mostly seen after_____?
	Immediately	44 (12.57%)
	Before 12 hours	34 (9.71%)
	12–24 hours	63 (18%)
	After 3 days	16 (4.57%)
	After a week	20 (5.71%)
	No withdrawal effects	114 (32.57%)
	No specific time	59 (16.85%)
4	What do you experience after taking energy drinks?
	Experience weight gain	102 (29.14%)
	Experience palpitation	58 (16.57%)
	experience tachycardia and hypertension	66 (18.857%)
	Experience dental caries	66 (18.57%)
	Experience neuropshychosis	58 (16.57%)
5	*What is your pattern of drinking energy drinks? (multiple choice)
	During studying	188 (53.7%)
	During partying	72 (20.5%)
	During taking food	65 (18.5%)
	During driving	42 (12%)
	During free time	77 (22%)
	Before any sports	15 (4.28%)
	During stress	116 (33.1%)

Medical students study of Dow, Sindh, Jinnah and Liaquat National Medical College, Karachi Pakistan 2012.

“*” indicates multiple choice questions.