Like all medicines, Diltiazem Hydrochloride tablets may cause side effects, although not everyone gets them.
Tell your doctor if you notice any of the following side effects.
Very common (occurs in more than 1 in 10 users): water retention causing swelling.
Common (occurs in less than 1 in 10 users): headache, dizziness, heart block, palpitations, flushing, constipation, indigestion, stomach pain, feeling sick, skin redness, feeling of general discomfort or illness.
Uncommon (occurs in less than 1 in 100 users): nervousness, difficulty sleeping, slow heart beat, feeling faint when getting up due to low blood pressure, being sick, diarrhoea, increase in liver enzymes (as seen in blood tests).
Rare (occurs in less than 1 in 1,000 users): dry mouth, itchy skin rash with pale or red irregular raised patches.
Not known: lowered number of platelets in the blood (as seen in blood tests), changes in mood (including depression), inflammation of the liver causing yellowing of the skin or eyes (hepatitis), heart failure, inflammation of the blood vessels, enlargement of the gums, sensitivity to light, sweating, enlarged breasts in men, tremor, slurred speech, restlessness, muscle spasm of neck, shoulders and body, anxiety, distress (extrapyramidal syndrome).
Rash and other severe skin reactions including - circular, severe skin rash (toxic epidermal necrolysis), severe form of skin rash with flushing, fever, blisters or ulcers (Steven-Johnson’s
syndrome), inflammation and scaling of skin (exfoliative dermatitis), irregular red patches of the skin of the hands and arms (erythema multiforme), boil-like inflammation of the skin (exanthematous pustulosis).
If you have any of the side effects, they get worse, or if you notice any side effects not listed, please tell your doctor or pharmacist.