Mnemonic: “PHILIPS OCP”
P: Phenytoin
H: Halogens
I: Isoniazid
L: Lithium
P: Phenobarbitone
S: Steroids
OCP: Oral Contraceptive Pills
P: Phenytoin
H: Halogens
I: Isoniazid
L: Lithium
P: Phenobarbitone
S: Steroids
OCP: Oral Contraceptive Pills