Phentermine can interact to other drugs, increasing or decreasing their therapeutic effect.
Phentermine and other appetite suppressant drugs
The use of Phentermine with other sympathomimetic amines may cause cardiovascular side effects (tachycardia, hypertension or impaired heart rate).
Phentermine combined with thyroid hormones
A joint use of Phentermine and thyroid hormones can increase the stimulation of the CNS, and thus enhance the effect of Phentermine, provoking side effects (dizziness, nausea, dry mouth, nervousness, anxiety and insomnia).
Phentermine and MAO inhibitors
Phentermine intensifies the action of monoamine oxidase inhibitors (Iproniazid; Pirlindole; Selegiline). Simultaneous use of Phentermine and MAO inhibitors may severely increase the blood pressure and causes the risk of stroke and cardiovascular diseases.
Hence, it is not recommended to take MAO inhibitors along with Phentermine.
Moreover, you can only start taking MAO inhibitors at least 14 days after the termination of drug Phentermine.
Phentermine and adrenergic neuron blockers
Phentermine can lessen hypotensive effect of adrenergic neuron blockers (Clonidine, Methyldopa and Guanethidine). Therefore, one should control the blood pressure during the simultaneous use of Phentermine and antihypertensive drugs. If necessary, one can increase the dose of antihypertensive drugs.
Phentermine and hypoglycemic drugs
During anti-obesity therapy, weight loss can improve metabolic control and tissue insulin sensitivity in patients with diabetes mellitus. Thus, diabetic patients might need to reduce the dose of insulin or hypoglycemic drugs.
Phentermine and alcohol
Consumption of alcohol during anti-obesity therapy by means of Phentermine may cause or strengthen CNS side effects (giddiness, worry, nervousness, tremor or sleeplessness).
That is why, people, who take weight loss drug Phentermine, should better refuse from alcohol beverages.
If you are going to take Phentermine in combination with other drugs, please make sure these drugs do not interact with Phentermine. If you have never used Phentermine pills, but you want to buy them online without prescription, consult the online pharmacist before making order.